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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2502.18445">arXiv:2502.18445</a> <span> [<a href="https://arxiv.org/pdf/2502.18445">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Broadband surface phonon spectroscopy by time-domain extreme ultraviolet diffuse scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Capotondi%2C+F">F. Capotondi</a>, <a href="/search/physics?searchtype=author&query=Maznev%2C+A">A. Maznev</a>, <a href="/search/physics?searchtype=author&query=Bencivenga%2C+F">F. Bencivenga</a>, <a href="/search/physics?searchtype=author&query=Bonetti%2C+S">S. Bonetti</a>, <a href="/search/physics?searchtype=author&query=Fainozzi%2C+D">D. Fainozzi</a>, <a href="/search/physics?searchtype=author&query=Fausti%2C+D">D. Fausti</a>, <a href="/search/physics?searchtype=author&query=Foglia%2C+L">L. Foglia</a>, <a href="/search/physics?searchtype=author&query=Gutt%2C+C">C. Gutt</a>, <a href="/search/physics?searchtype=author&query=Jaouen%2C+N">N. Jaouen</a>, <a href="/search/physics?searchtype=author&query=Ksenzov%2C+D">D. Ksenzov</a>, <a href="/search/physics?searchtype=author&query=Masciovecchio%2C+C">C. Masciovecchio</a>, <a href="/search/physics?searchtype=author&query=Nelson%2C+K+A">K. A. Nelson</a>, <a href="/search/physics?searchtype=author&query=Nikolov%2C+I">I. Nikolov</a>, <a href="/search/physics?searchtype=author&query=Pancaldi%2C+M">M. Pancaldi</a>, <a href="/search/physics?searchtype=author&query=Pedersoli%2C+E">E. Pedersoli</a>, <a href="/search/physics?searchtype=author&query=Pfau%2C+B">B. Pfau</a>, <a href="/search/physics?searchtype=author&query=Raimondi%2C+L">L. Raimondi</a>, <a href="/search/physics?searchtype=author&query=Romanelli%2C+F">F. Romanelli</a>, <a href="/search/physics?searchtype=author&query=Totani%2C+R">R. Totani</a>, <a href="/search/physics?searchtype=author&query=Trigo%2C+M">M. Trigo</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2502.18445v1-abstract-short" style="display: inline;"> We present experimental evidence that the dynamics of surface acoustic waves, with wavelengths ranging from tens to hundreds of nanometers, are encoded in the time-dependent diffuse scattering of extreme ultraviolet light. By measuring the diffuse scattering from a surface after an ultrafast optical excitation, we determined the dispersion relation of surface acoustic wave-packets across a broad r… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.18445v1-abstract-full').style.display = 'inline'; document.getElementById('2502.18445v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.18445v1-abstract-full" style="display: none;"> We present experimental evidence that the dynamics of surface acoustic waves, with wavelengths ranging from tens to hundreds of nanometers, are encoded in the time-dependent diffuse scattering of extreme ultraviolet light. By measuring the diffuse scattering from a surface after an ultrafast optical excitation, we determined the dispersion relation of surface acoustic wave-packets across a broad range of wavevectors in various samples. The comparison of the signal amplitudes from samples with different surface morphologies suggests that the underlying excitation mechanism is related to the natural roughness of the samples surface. This simple and contactless approach represents a complementary experimental tool to transient grating or Brillouin spectroscopy, providing valuable insights into nanoscale surface dynamics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.18445v1-abstract-full').style.display = 'none'; document.getElementById('2502.18445v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Main text + supplementary material</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2403.19382">arXiv:2403.19382</a> <span> [<a href="https://arxiv.org/pdf/2403.19382">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Other Condensed Matter">cond-mat.other</span> </div> </div> <p class="title is-5 mathjax"> Structured illumination microscopy with extreme ultraviolet pulses </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mincigrucci%2C+R">R. Mincigrucci</a>, <a href="/search/physics?searchtype=author&query=Paltanin%2C+E">E. Paltanin</a>, <a href="/search/physics?searchtype=author&query=Pelli-Cresi%2C+J+-">J. -S. Pelli-Cresi</a>, <a href="/search/physics?searchtype=author&query=Gala%2C+F">F. Gala</a>, <a href="/search/physics?searchtype=author&query=Pontecorvo%2C+E">E. Pontecorvo</a>, <a href="/search/physics?searchtype=author&query=Foglia%2C+L">L. Foglia</a>, <a href="/search/physics?searchtype=author&query=De+Angelis%2C+D">D. De Angelis</a>, <a href="/search/physics?searchtype=author&query=Fainozzi%2C+D">D. Fainozzi</a>, <a href="/search/physics?searchtype=author&query=Gessini%2C+A">A. Gessini</a>, <a href="/search/physics?searchtype=author&query=Molina%2C+D+S+P">D. S. P. Molina</a>, <a href="/search/physics?searchtype=author&query=Stranik%2C+O">O. Stranik</a>, <a href="/search/physics?searchtype=author&query=Wechsler%2C+F">F. Wechsler</a>, <a href="/search/physics?searchtype=author&query=Heintzmann%2C+R">R. Heintzmann</a>, <a href="/search/physics?searchtype=author&query=Ruocco%2C+G">G. Ruocco</a>, <a href="/search/physics?searchtype=author&query=Bencivenga%2C+F">F. Bencivenga</a>, <a href="/search/physics?searchtype=author&query=Masciovecchio%2C+C">C. Masciovecchio</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2403.19382v1-abstract-short" style="display: inline;"> The relentless pursuit of understanding matter at ever-finer scales has pushed optical microscopy to surpass the diffraction limit and produced the super-resolution microscopy which enables visualizing structures shorter than the wavelength of light. In the present work, we harnessed extreme ultraviolet beams to create a sub-渭m grating structure, which was revealed by extreme ultraviolet structure… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.19382v1-abstract-full').style.display = 'inline'; document.getElementById('2403.19382v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.19382v1-abstract-full" style="display: none;"> The relentless pursuit of understanding matter at ever-finer scales has pushed optical microscopy to surpass the diffraction limit and produced the super-resolution microscopy which enables visualizing structures shorter than the wavelength of light. In the present work, we harnessed extreme ultraviolet beams to create a sub-渭m grating structure, which was revealed by extreme ultraviolet structured illumination microscopy. This achievement marks the first step toward extending such a super-resolution technique into the X-ray regime, where achieving atomic-scale resolution becomes a charming possibility. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.19382v1-abstract-full').style.display = 'none'; document.getElementById('2403.19382v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.08809">arXiv:2311.08809</a> <span> [<a href="https://arxiv.org/pdf/2311.08809">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41566-024-01389-z">10.1038/s41566-024-01389-z <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A high-efficiency programmable modulator for extreme ultraviolet light with nm feature size based on an electronic phase transition </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Vaskivskyi%2C+I">Igor Vaskivskyi</a>, <a href="/search/physics?searchtype=author&query=Mraz%2C+A">Anze Mraz</a>, <a href="/search/physics?searchtype=author&query=Venturini%2C+R">Rok Venturini</a>, <a href="/search/physics?searchtype=author&query=Jecl%2C+G">Gregor Jecl</a>, <a href="/search/physics?searchtype=author&query=Vaskivskyi%2C+Y">Yevhenii Vaskivskyi</a>, <a href="/search/physics?searchtype=author&query=Mincigrucci%2C+R">Riccardo Mincigrucci</a>, <a href="/search/physics?searchtype=author&query=Foglia%2C+L">Laura Foglia</a>, <a href="/search/physics?searchtype=author&query=De+Angelis%2C+D">Dario De Angelis</a>, <a href="/search/physics?searchtype=author&query=Pelli-Cresi%2C+J">Jacopo-Stefano Pelli-Cresi</a>, <a href="/search/physics?searchtype=author&query=Paltanin%2C+E">Ettore Paltanin</a>, <a href="/search/physics?searchtype=author&query=Fainozzi%2C+D">Danny Fainozzi</a>, <a href="/search/physics?searchtype=author&query=Bencivenga%2C+F">Filippo Bencivenga</a>, <a href="/search/physics?searchtype=author&query=Masciovecchio%2C+C">Claudio Masciovecchio</a>, <a href="/search/physics?searchtype=author&query=Mihailovic%2C+D">Dragan Mihailovic</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2311.08809v1-abstract-short" style="display: inline;"> The absence of efficient light modulators for extreme ultraviolet (EUV) and X-ray photons significantly limits their real-life application, particularly when even slight complexity of the beam patterns is required. Here we report on a novel approach to reversible imprinting of a holographic mask in an electronic Wigner crystal material with a sub-90 nm feature size. The structure is imprinted on a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.08809v1-abstract-full').style.display = 'inline'; document.getElementById('2311.08809v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.08809v1-abstract-full" style="display: none;"> The absence of efficient light modulators for extreme ultraviolet (EUV) and X-ray photons significantly limits their real-life application, particularly when even slight complexity of the beam patterns is required. Here we report on a novel approach to reversible imprinting of a holographic mask in an electronic Wigner crystal material with a sub-90 nm feature size. The structure is imprinted on a sub-picosecond time-scale using EUV laser pulses and acts as a high-efficiency diffraction grating that deflects EUV or soft X-ray light. The imprinted nanostructure is stable after the removal of the exciting beams at low temperatures but can be easily erased by a single heating beam. Modeling shows that the efficiency of the device can exceed 1%, approaching state-of-the-art etched gratings, but with the benefit of being programmable and tunable over a large range of wavelengths. The observed effect is based on the rapid change of lattice constant upon transition between metastable electronically-ordered phases in a layered transition metal dichalcogenide. The proposed approach is potentially useful for creating tunable light modulators in the EUV and soft X-ray spectral ranges. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.08809v1-abstract-full').style.display = 'none'; document.getElementById('2311.08809v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.15734">arXiv:2310.15734</a> <span> [<a href="https://arxiv.org/pdf/2310.15734">pdf</a>, <a href="https://arxiv.org/format/2310.15734">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Nanoscale transient polarization gratings </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Foglia%2C+L">Laura Foglia</a>, <a href="/search/physics?searchtype=author&query=Wehinger%2C+B">Bj枚rn Wehinger</a>, <a href="/search/physics?searchtype=author&query=Perosa%2C+G">Giovanni Perosa</a>, <a href="/search/physics?searchtype=author&query=Mincigrucci%2C+R">Riccardo Mincigrucci</a>, <a href="/search/physics?searchtype=author&query=Allaria%2C+E">Enrico Allaria</a>, <a href="/search/physics?searchtype=author&query=Armillotta%2C+F">Francesco Armillotta</a>, <a href="/search/physics?searchtype=author&query=Brynes%2C+A">Alexander Brynes</a>, <a href="/search/physics?searchtype=author&query=Cucini%2C+R">Riccardo Cucini</a>, <a href="/search/physics?searchtype=author&query=De+Angelis%2C+D">Dario De Angelis</a>, <a href="/search/physics?searchtype=author&query=De+Ninno%2C+G">Giovanni De Ninno</a>, <a href="/search/physics?searchtype=author&query=Engel%2C+W+D">W. Dieter Engel</a>, <a href="/search/physics?searchtype=author&query=Fainozzi%2C+D">Danny Fainozzi</a>, <a href="/search/physics?searchtype=author&query=Giannessi%2C+L">Luca Giannessi</a>, <a href="/search/physics?searchtype=author&query=Khatu%2C+N+N">Nupur N. Khatu</a>, <a href="/search/physics?searchtype=author&query=Laterza%2C+S">Simone Laterza</a>, <a href="/search/physics?searchtype=author&query=Paltanin%2C+E">Ettore Paltanin</a>, <a href="/search/physics?searchtype=author&query=Pelli-Cresi%2C+J+S">Jacopo Stefano Pelli-Cresi</a>, <a href="/search/physics?searchtype=author&query=Penco%2C+G">Giuseppe Penco</a>, <a href="/search/physics?searchtype=author&query=Puntel%2C+D">Denny Puntel</a>, <a href="/search/physics?searchtype=author&query=Ribi%C4%8D%2C+P+R">Primo啪 Rebernik Ribi膷</a>, <a href="/search/physics?searchtype=author&query=Sottocorona%2C+F">Filippo Sottocorona</a>, <a href="/search/physics?searchtype=author&query=Trov%C3%B2%2C+M">Mauro Trov貌</a>, <a href="/search/physics?searchtype=author&query=Schmising%2C+C+v+K">Clemens von Korff Schmising</a>, <a href="/search/physics?searchtype=author&query=Yao%2C+K">Kelvin Yao</a>, <a href="/search/physics?searchtype=author&query=Masciovecchio%2C+C">Claudio Masciovecchio</a> , et al. (2 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2310.15734v1-abstract-short" style="display: inline;"> We present the generation of transient polarization gratings at the nanoscale, achieved using a tailored accelerator configuration of the FERMI free electron laser. We demonstrate the capabilities of such a transient polarization grating by comparing its induced dynamics with the ones triggered by a more conventional intensity grating on a thin film ferrimagnetic alloy. While the signal of the int… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.15734v1-abstract-full').style.display = 'inline'; document.getElementById('2310.15734v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.15734v1-abstract-full" style="display: none;"> We present the generation of transient polarization gratings at the nanoscale, achieved using a tailored accelerator configuration of the FERMI free electron laser. We demonstrate the capabilities of such a transient polarization grating by comparing its induced dynamics with the ones triggered by a more conventional intensity grating on a thin film ferrimagnetic alloy. While the signal of the intensity grating is dominated by the thermoelastic response of the system, such a contribution is suppressed in the case of the polarization grating. This exposes helicity-dependent magnetization dynamics that have so-far remained hidden under the large thermally driven response. We anticipate nanoscale transient polarization gratings to become useful for the study of any physical, chemical and biological systems possessing chiral symmetry. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.15734v1-abstract-full').style.display = 'none'; document.getElementById('2310.15734v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2307.04134">arXiv:2307.04134</a> <span> [<a href="https://arxiv.org/pdf/2307.04134">pdf</a>, <a href="https://arxiv.org/format/2307.04134">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> </div> <p class="title is-5 mathjax"> Stimulated Brillouin scattering at 1 nm-1 wavevector by extreme ultraviolet transient gratings </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fainozzi%2C+D">Danny Fainozzi</a>, <a href="/search/physics?searchtype=author&query=Foglia%2C+L">Laura Foglia</a>, <a href="/search/physics?searchtype=author&query=Mincigrucci%2C+R">Riccardo Mincigrucci</a>, <a href="/search/physics?searchtype=author&query=Khatu%2C+N+N">Nupur N. Khatu</a>, <a href="/search/physics?searchtype=author&query=Paltanin%2C+E">Ettore Paltanin</a>, <a href="/search/physics?searchtype=author&query=Masciovecchio%2C+C">Claudio Masciovecchio</a>, <a href="/search/physics?searchtype=author&query=Bencivenga%2C+F">Filippo Bencivenga</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2307.04134v1-abstract-short" style="display: inline;"> We crossed two femtosecond extreme ultraviolet (EUV) pulses in a beta - Ga2O3 (001) single crystal to create transient gratings (TG) of light intensity with sub-100 nm spatial periodicity. The EUV TG excitation launches phonon modes, whose dynamics were revealed via the backward diffraction of a third, time-delayed, EUV probe pulse. In addition to the modes typically observed in this kind of exper… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.04134v1-abstract-full').style.display = 'inline'; document.getElementById('2307.04134v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2307.04134v1-abstract-full" style="display: none;"> We crossed two femtosecond extreme ultraviolet (EUV) pulses in a beta - Ga2O3 (001) single crystal to create transient gratings (TG) of light intensity with sub-100 nm spatial periodicity. The EUV TG excitation launches phonon modes, whose dynamics were revealed via the backward diffraction of a third, time-delayed, EUV probe pulse. In addition to the modes typically observed in this kind of experiment, the phase-matching condition imposed by the TG, combined with the sharp penetration depth of the EUV excitation pulses, permitted to generate and detect phonons with a wavevector tangibly larger (approximately 1 nm-1) than the EUV TG one, via stimulated Brillouin back-scattering (SBBS) of the EUV probe. While SBBS of an optical probe was reported in previous EUV TG experiments, the extension of SBBS to short wavelength radiation can be used as a contact-less experimental tool for filling the gap between the wavevector range accessible through inelastic hard X-ray and thermal neutron scattering techniques, and the one accessible through Brillouin scattering of visible and UV light. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.04134v1-abstract-full').style.display = 'none'; document.getElementById('2307.04134v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 July, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 3 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.05258">arXiv:2305.05258</a> <span> [<a href="https://arxiv.org/pdf/2305.05258">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.107.214305">10.1103/PhysRevB.107.214305 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> FEL stochastic spectroscopy revealing silicon bond softening dynamics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=De+Angelis%2C+D">Dario De Angelis</a>, <a href="/search/physics?searchtype=author&query=Principi%2C+E">Emiliano Principi</a>, <a href="/search/physics?searchtype=author&query=Bencivenga%2C+F">Filippo Bencivenga</a>, <a href="/search/physics?searchtype=author&query=Fausti%2C+D">Daniele Fausti</a>, <a href="/search/physics?searchtype=author&query=Foglia%2C+L">Laura Foglia</a>, <a href="/search/physics?searchtype=author&query=Klein%2C+Y">Yishay Klein</a>, <a href="/search/physics?searchtype=author&query=Manfredda%2C+M">Michele Manfredda</a>, <a href="/search/physics?searchtype=author&query=Mincigrucci%2C+R">Riccardo Mincigrucci</a>, <a href="/search/physics?searchtype=author&query=Montanaro%2C+A">Angela Montanaro</a>, <a href="/search/physics?searchtype=author&query=Pedersoli%2C+E">Emanuele Pedersoli</a>, <a href="/search/physics?searchtype=author&query=Cresi%2C+J+S+P">Jacopo Stefano Pelli Cresi</a>, <a href="/search/physics?searchtype=author&query=Perosa%2C+G">Giovanni Perosa</a>, <a href="/search/physics?searchtype=author&query=Prince%2C+K+C">Kevin C. Prince</a>, <a href="/search/physics?searchtype=author&query=Razzoli%2C+E">Elia Razzoli</a>, <a href="/search/physics?searchtype=author&query=Shwartz%2C+S">Sharon Shwartz</a>, <a href="/search/physics?searchtype=author&query=Simoncig%2C+A">Alberto Simoncig</a>, <a href="/search/physics?searchtype=author&query=Spampinati%2C+S">Simone Spampinati</a>, <a href="/search/physics?searchtype=author&query=Svetina%2C+C">Cristian Svetina</a>, <a href="/search/physics?searchtype=author&query=Szlachetko%2C+J">Jakub Szlachetko</a>, <a href="/search/physics?searchtype=author&query=Tripathi%2C+A">Alok Tripathi</a>, <a href="/search/physics?searchtype=author&query=Vartanyants%2C+I+A">Ivan A. Vartanyants</a>, <a href="/search/physics?searchtype=author&query=Zangrando%2C+M">Marco Zangrando</a>, <a href="/search/physics?searchtype=author&query=Capotondi%2C+F">Flavio Capotondi</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2305.05258v1-abstract-short" style="display: inline;"> Time-resolved X-ray Emission/Absorption Spectroscopy (Tr-XES/XAS) is an informative experimental tool sensitive to electronic dynamics in materials, widely exploited in diverse research fields. Typically, Tr-XES/XAS requires X-ray pulses with both a narrow bandwidth and sub-picosecond pulse duration, a combination that in principle finds its optimum with Fourier transform-limited pulses. In this w… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.05258v1-abstract-full').style.display = 'inline'; document.getElementById('2305.05258v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.05258v1-abstract-full" style="display: none;"> Time-resolved X-ray Emission/Absorption Spectroscopy (Tr-XES/XAS) is an informative experimental tool sensitive to electronic dynamics in materials, widely exploited in diverse research fields. Typically, Tr-XES/XAS requires X-ray pulses with both a narrow bandwidth and sub-picosecond pulse duration, a combination that in principle finds its optimum with Fourier transform-limited pulses. In this work, we explore an alternative xperimental approach, capable of simultaneously retrieving information about unoccupied (XAS) and occupied (XES) states from the stochastic fluctuations of broadband extreme ultraviolet pulses of a free-electron laser. We used this method, in combination with singular value decomposition and Tikhonov regularization procedures, to determine the XAS/XES response from a crystalline silicon sample at the L2,3-edge, with an energy resolution of a few tens of meV. Finally, we combined this spectroscopic method with a pump-probe approach to measure structural and electronic dynamics of a silicon membrane. Tr-XAS/XES data obtained after photoexcitation with an optical laser pulse at 390 nm allowed us to observe perturbations of the band structure, which are compatible with the formation of the predicted precursor state of a non-thermal solid-liquid phase transition associated with a bond softening phenomenon. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.05258v1-abstract-full').style.display = 'none'; document.getElementById('2305.05258v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.18166">arXiv:2303.18166</a> <span> [<a href="https://arxiv.org/pdf/2303.18166">pdf</a>, <a href="https://arxiv.org/format/2303.18166">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Image and Video Processing">eess.IV</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Data Analysis, Statistics and Probability">physics.data-an</span> </div> </div> <p class="title is-5 mathjax"> Three-dimensional coherent diffraction snapshot imaging using extreme ultraviolet radiation from a free electron laser </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fainozzi%2C+D">Danny Fainozzi</a>, <a href="/search/physics?searchtype=author&query=Ippoliti%2C+M">Matteo Ippoliti</a>, <a href="/search/physics?searchtype=author&query=Bill%C3%A8%2C+F">Fulvio Bill猫</a>, <a href="/search/physics?searchtype=author&query=De+Angelis%2C+D">Dario De Angelis</a>, <a href="/search/physics?searchtype=author&query=Foglia%2C+L">Laura Foglia</a>, <a href="/search/physics?searchtype=author&query=Masciovecchio%2C+C">Claudio Masciovecchio</a>, <a href="/search/physics?searchtype=author&query=Mincigrucci%2C+R">Riccardo Mincigrucci</a>, <a href="/search/physics?searchtype=author&query=Pancaldi%2C+M">Matteo Pancaldi</a>, <a href="/search/physics?searchtype=author&query=Pedersoli%2C+E">Emanuele Pedersoli</a>, <a href="/search/physics?searchtype=author&query=Gunther%2C+C+M">Christian M. Gunther</a>, <a href="/search/physics?searchtype=author&query=Pfau%2C+B">Bastian Pfau</a>, <a href="/search/physics?searchtype=author&query=Schneider%2C+M">Michael Schneider</a>, <a href="/search/physics?searchtype=author&query=Schmising%2C+C+V+K">Clemens Von Korff Schmising</a>, <a href="/search/physics?searchtype=author&query=Eisebitt%2C+S">Stefan Eisebitt</a>, <a href="/search/physics?searchtype=author&query=Kourousias%2C+G">George Kourousias</a>, <a href="/search/physics?searchtype=author&query=Bencivenga%2C+F">Filippo Bencivenga</a>, <a href="/search/physics?searchtype=author&query=Capotondi%2C+F">Flavio Capotondi</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2303.18166v2-abstract-short" style="display: inline;"> The possibility to obtain a three-dimensional representation of a single object with sub-$渭$m resolution is crucial in many fields, from material science to clinical diagnostics. This is typically achieved through tomography, which combines multiple two-dimensional images of the same object captured at different orientations. However, this serial imaging method prevents single-shot acquisition in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.18166v2-abstract-full').style.display = 'inline'; document.getElementById('2303.18166v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.18166v2-abstract-full" style="display: none;"> The possibility to obtain a three-dimensional representation of a single object with sub-$渭$m resolution is crucial in many fields, from material science to clinical diagnostics. This is typically achieved through tomography, which combines multiple two-dimensional images of the same object captured at different orientations. However, this serial imaging method prevents single-shot acquisition in imaging experiments at free electron lasers. In the present experiment, we report on a new approach to 3D imaging using extreme-ultraviolet radiation. In this method, two EUV pulses hit simultaneously an isolated 3D object from different sides, generating independent coherent diffraction patterns, resulting in two distinct bidimensional views obtained via phase retrieval. These views are then used to obtain a 3D reconstruction using a ray tracing algorithm. This EUV stereoscopic imaging approach, similar to the natural process of binocular vision, provides sub-$渭$m spatial resolution and single shot capability. Moreover, ultrafast time resolution and spectroscopy can be readily implemented, a further extension to X-ray wavelengths can be envisioned as well. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.18166v2-abstract-full').style.display = 'none'; document.getElementById('2303.18166v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Authors Danny Fainozzi and Matteo Ippoliti contributed equally</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2212.01116">arXiv:2212.01116</a> <span> [<a href="https://arxiv.org/pdf/2212.01116">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Extreme ultraviolet transient gratings: A tool for nanoscale photoacoustics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Foglia%2C+L">L. Foglia</a>, <a href="/search/physics?searchtype=author&query=Mincigrucci%2C+R">R. Mincigrucci</a>, <a href="/search/physics?searchtype=author&query=Maznev%2C+A+A">A. A. Maznev</a>, <a href="/search/physics?searchtype=author&query=Baldi%2C+G">G. Baldi</a>, <a href="/search/physics?searchtype=author&query=Capotondi%2C+F">F. Capotondi</a>, <a href="/search/physics?searchtype=author&query=Caporaletti%2C+F">F. Caporaletti</a>, <a href="/search/physics?searchtype=author&query=Comin%2C+R">R. Comin</a>, <a href="/search/physics?searchtype=author&query=De+Angelis%2C+D">D. De Angelis</a>, <a href="/search/physics?searchtype=author&query=Duncan%2C+R+A">R. A. Duncan</a>, <a href="/search/physics?searchtype=author&query=Fainozzi%2C+D">D. Fainozzi</a>, <a href="/search/physics?searchtype=author&query=Kurdi%2C+G">G. Kurdi</a>, <a href="/search/physics?searchtype=author&query=Li%2C+J">J. Li</a>, <a href="/search/physics?searchtype=author&query=Martinelli%2C+A">A. Martinelli</a>, <a href="/search/physics?searchtype=author&query=Masciovecchio%2C+C">C. Masciovecchio</a>, <a href="/search/physics?searchtype=author&query=Monaco%2C+G">G. Monaco</a>, <a href="/search/physics?searchtype=author&query=Milloch%2C+A">A. Milloch</a>, <a href="/search/physics?searchtype=author&query=Nelson%2C+K+A">K. A. Nelson</a>, <a href="/search/physics?searchtype=author&query=Occhialini%2C+C+A">C. A. Occhialini</a>, <a href="/search/physics?searchtype=author&query=Pancaldi%2C+M">M. Pancaldi</a>, <a href="/search/physics?searchtype=author&query=Pedersoli%2C+E">E. Pedersoli</a>, <a href="/search/physics?searchtype=author&query=Pelli-Cresi%2C+J+S">J. S. Pelli-Cresi</a>, <a href="/search/physics?searchtype=author&query=Simoncig%2C+A">A. Simoncig</a>, <a href="/search/physics?searchtype=author&query=Travasso%2C+F">F. Travasso</a>, <a href="/search/physics?searchtype=author&query=Wehinger%2C+B">B. Wehinger</a>, <a href="/search/physics?searchtype=author&query=Zanatta%2C+M">M. Zanatta</a> , et al. (1 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2212.01116v1-abstract-short" style="display: inline;"> Collective lattice dynamics determine essential aspects of condensed matter, such as elastic and thermal properties. These exhibit strong dependence on the length-scale, reflecting the marked wavevector dependence of lattice excitations. The extreme ultraviolet transient grating (EUV TG) approach has demonstrated the potential of accessing a wavevector range corresponding to the 10s of nm length-s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.01116v1-abstract-full').style.display = 'inline'; document.getElementById('2212.01116v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2212.01116v1-abstract-full" style="display: none;"> Collective lattice dynamics determine essential aspects of condensed matter, such as elastic and thermal properties. These exhibit strong dependence on the length-scale, reflecting the marked wavevector dependence of lattice excitations. The extreme ultraviolet transient grating (EUV TG) approach has demonstrated the potential of accessing a wavevector range corresponding to the 10s of nm length-scale, representing a spatial scale of the highest relevance for fundamental physics and forefront technology, previously inaccessible by optical TG and other inelastic scattering methods. In this manuscript we report on the capabilities of this technique in the context of probing thermoelastic properties of matter, both in the bulk and at the surface, as well as discussing future developments and practical considerations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.01116v1-abstract-full').style.display = 'none'; document.getElementById('2212.01116v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 December, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.04996">arXiv:2203.04996</a> <span> [<a href="https://arxiv.org/pdf/2203.04996">pdf</a>, <a href="https://arxiv.org/format/2203.04996">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acs.nanolett.2c01060">10.1021/acs.nanolett.2c01060 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> All-optical switching on the nanometer scale excited and probed with femtosecond extreme ultraviolet pulses </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Yao%2C+K">Kelvin Yao</a>, <a href="/search/physics?searchtype=author&query=Steinbach%2C+F">Felix Steinbach</a>, <a href="/search/physics?searchtype=author&query=Borchert%2C+M">Martin Borchert</a>, <a href="/search/physics?searchtype=author&query=Schick%2C+D">Daniel Schick</a>, <a href="/search/physics?searchtype=author&query=Engel%2C+D">Dieter Engel</a>, <a href="/search/physics?searchtype=author&query=Bencivenga%2C+F">Filippo Bencivenga</a>, <a href="/search/physics?searchtype=author&query=Mincigrucci%2C+R">Riccardo Mincigrucci</a>, <a href="/search/physics?searchtype=author&query=Foglia%2C+L">Laura Foglia</a>, <a href="/search/physics?searchtype=author&query=Pedersoli%2C+E">Emanuele Pedersoli</a>, <a href="/search/physics?searchtype=author&query=De+Angelis%2C+D">Dario De Angelis</a>, <a href="/search/physics?searchtype=author&query=Pancaldi%2C+M">Matteo Pancaldi</a>, <a href="/search/physics?searchtype=author&query=Wehinger%2C+B">Bjoern Wehinger</a>, <a href="/search/physics?searchtype=author&query=Capotondi%2C+F">Flavio Capotondi</a>, <a href="/search/physics?searchtype=author&query=Masciovecchio%2C+C">Claudio Masciovecchio</a>, <a href="/search/physics?searchtype=author&query=Eisebitt%2C+S">Stefan Eisebitt</a>, <a href="/search/physics?searchtype=author&query=Schmising%2C+C+v+K">Clemens von Korff Schmising</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2203.04996v2-abstract-short" style="display: inline;"> Ultrafast control of magnetization on the nanometer length scale, in particular all-optical switching, is key to putting ultrafast magnetism on the path towards future technological application in data storage technology. However, magnetization manipulation with light on this length scale is challenging due to the wavelength limitations of optical radiation. Here, we excite transient magnetic grat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.04996v2-abstract-full').style.display = 'inline'; document.getElementById('2203.04996v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.04996v2-abstract-full" style="display: none;"> Ultrafast control of magnetization on the nanometer length scale, in particular all-optical switching, is key to putting ultrafast magnetism on the path towards future technological application in data storage technology. However, magnetization manipulation with light on this length scale is challenging due to the wavelength limitations of optical radiation. Here, we excite transient magnetic gratings in a GdFe alloy with a periodicity of 87 nm by interference of two coherent femtosecond light pulses in the extreme ultraviolet spectral range at the free electron laser facility FERMI. The subsequent ultrafast evolution of the magnetization pattern is probed by diffraction of a third, time-delayed pulse tuned to the Gd N-edge at a wavelength of 8.3 nm. By examining the simultaneously recorded first and second diffraction orders and by performing reference real-space measurements with a wide-field magneto-optical microscope with femtosecond time resolution, we can conclusively demonstrate the ultrafast emergence of all-optical switching on the nanometer length scale. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.04996v2-abstract-full').style.display = 'none'; document.getElementById('2203.04996v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 5 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2104.01030">arXiv:2104.01030</a> <span> [<a href="https://arxiv.org/pdf/2104.01030">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41566-021-00797-9">10.1038/s41566-021-00797-9 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Hard X-ray Transient Grating Spectroscopy on Bismuth Germanate </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rouxel%2C+J+R">Jeremy R. Rouxel</a>, <a href="/search/physics?searchtype=author&query=Fainozzi%2C+D">Danny Fainozzi</a>, <a href="/search/physics?searchtype=author&query=Mankowsky%2C+R">Roman Mankowsky</a>, <a href="/search/physics?searchtype=author&query=Rosner%2C+B">Benedikt Rosner</a>, <a href="/search/physics?searchtype=author&query=Seniutinas%2C+G">Gediminas Seniutinas</a>, <a href="/search/physics?searchtype=author&query=Mincigrucci%2C+R">Riccardo Mincigrucci</a>, <a href="/search/physics?searchtype=author&query=Catalini%2C+S">Sara Catalini</a>, <a href="/search/physics?searchtype=author&query=Foglia%2C+L">Laura Foglia</a>, <a href="/search/physics?searchtype=author&query=Cucini%2C+R">Riccardo Cucini</a>, <a href="/search/physics?searchtype=author&query=Doring%2C+F">Florian Doring</a>, <a href="/search/physics?searchtype=author&query=Kubec%2C+A">Adam Kubec</a>, <a href="/search/physics?searchtype=author&query=Koch%2C+F">Frieder Koch</a>, <a href="/search/physics?searchtype=author&query=Bencivenga%2C+F">Filippo Bencivenga</a>, <a href="/search/physics?searchtype=author&query=Haddad%2C+A+A">Andre Al Haddad</a>, <a href="/search/physics?searchtype=author&query=Gessini%2C+A">Alessandro Gessini</a>, <a href="/search/physics?searchtype=author&query=Maznev%2C+A+A">Alexei A. Maznev</a>, <a href="/search/physics?searchtype=author&query=Cirelli%2C+C">Claudio Cirelli</a>, <a href="/search/physics?searchtype=author&query=Gerber%2C+S">Simon Gerber</a>, <a href="/search/physics?searchtype=author&query=Pedrini%2C+B">Bill Pedrini</a>, <a href="/search/physics?searchtype=author&query=Mancini%2C+G+F">Giulia F. Mancini</a>, <a href="/search/physics?searchtype=author&query=Razzoli%2C+E">Elia Razzoli</a>, <a href="/search/physics?searchtype=author&query=Burian%2C+M">Max Burian</a>, <a href="/search/physics?searchtype=author&query=Ueda%2C+H">Hiroki Ueda</a>, <a href="/search/physics?searchtype=author&query=Pamfilidis%2C+G">Georgios Pamfilidis</a>, <a href="/search/physics?searchtype=author&query=Ferrari%2C+E">Eugenio Ferrari</a> , et al. (22 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2104.01030v1-abstract-short" style="display: inline;"> Optical-domain Transient Grating (TG) spectroscopy is a versatile background-free four-wave-mixing technique used to probe vibrational, magnetic and electronic degrees of freedom in the time domain. The newly developed coherent X-ray Free Electron Laser sources allow its extension to the X-ray regime. Xrays offer multiple advantages for TG: their large penetration depth allows probing the bulk pro… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.01030v1-abstract-full').style.display = 'inline'; document.getElementById('2104.01030v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2104.01030v1-abstract-full" style="display: none;"> Optical-domain Transient Grating (TG) spectroscopy is a versatile background-free four-wave-mixing technique used to probe vibrational, magnetic and electronic degrees of freedom in the time domain. The newly developed coherent X-ray Free Electron Laser sources allow its extension to the X-ray regime. Xrays offer multiple advantages for TG: their large penetration depth allows probing the bulk properties of materials, their element-specificity can address core-excited states, and their short wavelengths create excitation gratings with unprecedented momentum transfer and spatial resolution. We demonstrate for the first time TG excitation in the hard X-ray range at 7.1 keV. In Bismuth Germanate (BGO), the nonresonant TG excitation generates coherent optical phonons detected as a function of time by diffraction of an optical probe pulse. This experiment demonstrates the ability to probe bulk properties of materials and paves the way for ultrafast coherent four-wave-mixing techniques using X-ray probes and involving nanoscale TG spatial periods. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.01030v1-abstract-full').style.display = 'none'; document.getElementById('2104.01030v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1605.02094">arXiv:1605.02094</a> <span> [<a href="https://arxiv.org/pdf/1605.02094">pdf</a>, <a href="https://arxiv.org/ps/1605.02094">ps</a>, <a href="https://arxiv.org/format/1605.02094">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Disordered Systems and Neural Networks">cond-mat.dis-nn</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Statistical Mechanics">cond-mat.stat-mech</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/srep14996">10.1038/srep14996 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Signature of a polyamorphic transition in the THz spectrum of vitreous GeO2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Cunsolo%2C+A">Alessandro Cunsolo</a>, <a href="/search/physics?searchtype=author&query=Li%2C+Y">Yan Li</a>, <a href="/search/physics?searchtype=author&query=Kodituwakku%2C+C+N">Chaminda N. Kodituwakku</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+S">Shibing Wang</a>, <a href="/search/physics?searchtype=author&query=Antonangeli%2C+D">Daniele Antonangeli</a>, <a href="/search/physics?searchtype=author&query=Bencivenga%2C+F">Filippo Bencivenga</a>, <a href="/search/physics?searchtype=author&query=Battistoni%2C+A">Andrea Battistoni</a>, <a href="/search/physics?searchtype=author&query=Verbeni%2C+R">Roberto Verbeni</a>, <a href="/search/physics?searchtype=author&query=Tsutsui%2C+S">Satoshi Tsutsui</a>, <a href="/search/physics?searchtype=author&query=Baron%2C+A+Q+R">Alfred Q. R. Baron</a>, <a href="/search/physics?searchtype=author&query=Mao%2C+H">Ho-Kwang Mao</a>, <a href="/search/physics?searchtype=author&query=Bolmatov%2C+D">Dima Bolmatov</a>, <a href="/search/physics?searchtype=author&query=Cai%2C+Y+Q">Yong Q. Cai</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1605.02094v1-abstract-short" style="display: inline;"> The THz spectrum of density fluctuations, $S(Q, 蠅)$, of vitreous GeO$_2$ at ambient temperature was measured by inelastic x-ray scattering from ambient pressure up to pressures well beyond that of the known $伪$-quartz to rutile polyamorphic (PA) transition. We observe significant differences in the spectral shape measured below and above the PA transition, in particular, in the 30-80 meV range. Gu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.02094v1-abstract-full').style.display = 'inline'; document.getElementById('1605.02094v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1605.02094v1-abstract-full" style="display: none;"> The THz spectrum of density fluctuations, $S(Q, 蠅)$, of vitreous GeO$_2$ at ambient temperature was measured by inelastic x-ray scattering from ambient pressure up to pressures well beyond that of the known $伪$-quartz to rutile polyamorphic (PA) transition. We observe significant differences in the spectral shape measured below and above the PA transition, in particular, in the 30-80 meV range. Guided by first-principle lattice dynamics calculations, we interpret the changes in the phonon dispersion as the evolution from a quartz-like to a rutile-like coordination. Notably, such a crossover is accompanied by a cusp-like behavior in the pressure dependence of the elastic response of the system. Overall, the presented results highlight the complex fingerprint of PA phenomena on the high-frequency phonon dispersion. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.02094v1-abstract-full').style.display = 'none'; document.getElementById('1605.02094v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 December, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Scientific Reports 5, 14996 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1307.7967">arXiv:1307.7967</a> <span> [<a href="https://arxiv.org/pdf/1307.7967">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> IRIDE White Book, An Interdisciplinary Research Infrastructure based on Dual Electron linacs&lasers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Alesini%2C+D">D. Alesini</a>, <a href="/search/physics?searchtype=author&query=Alessandroni%2C+M">M. Alessandroni</a>, <a href="/search/physics?searchtype=author&query=Anania%2C+M+P">M. P. Anania</a>, <a href="/search/physics?searchtype=author&query=Andreas%2C+S">S. Andreas</a>, <a href="/search/physics?searchtype=author&query=Angelone%2C+M">M. Angelone</a>, <a href="/search/physics?searchtype=author&query=Arcovito%2C+A">A. Arcovito</a>, <a href="/search/physics?searchtype=author&query=Arnesano%2C+F">F. Arnesano</a>, <a href="/search/physics?searchtype=author&query=Artioli%2C+M">M. Artioli</a>, <a href="/search/physics?searchtype=author&query=Avaldi%2C+L">L. Avaldi</a>, <a href="/search/physics?searchtype=author&query=Babusci%2C+D">D. Babusci</a>, <a href="/search/physics?searchtype=author&query=Bacci%2C+A">A. Bacci</a>, <a href="/search/physics?searchtype=author&query=Balerna%2C+A">A. Balerna</a>, <a href="/search/physics?searchtype=author&query=Bartalucci%2C+S">S. Bartalucci</a>, <a href="/search/physics?searchtype=author&query=Bedogni%2C+R">R. Bedogni</a>, <a href="/search/physics?searchtype=author&query=Bellaveglia%2C+M">M. Bellaveglia</a>, <a href="/search/physics?searchtype=author&query=Bencivenga%2C+F">F. Bencivenga</a>, <a href="/search/physics?searchtype=author&query=Benfatto%2C+M">M. Benfatto</a>, <a href="/search/physics?searchtype=author&query=Biedron%2C+S">S. Biedron</a>, <a href="/search/physics?searchtype=author&query=Bocci%2C+V">V. Bocci</a>, <a href="/search/physics?searchtype=author&query=Bolognesi%2C+M">M. Bolognesi</a>, <a href="/search/physics?searchtype=author&query=Bolognesi%2C+P">P. Bolognesi</a>, <a href="/search/physics?searchtype=author&query=Boni%2C+R">R. Boni</a>, <a href="/search/physics?searchtype=author&query=Bonifacio%2C+R">R. Bonifacio</a>, <a href="/search/physics?searchtype=author&query=Boscolo%2C+M">M. Boscolo</a>, <a href="/search/physics?searchtype=author&query=Boscherini%2C+F">F. Boscherini</a> , et al. (189 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1307.7967v1-abstract-short" style="display: inline;"> This report describes the scientific aims and potentials as well as the preliminary technical design of IRIDE, an innovative tool for multi-disciplinary investigations in a wide field of scientific, technological and industrial applications. IRIDE will be a high intensity 'particle factory', based on a combination of a high duty cycle radio-frequency superconducting electron linac and of high ener… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.7967v1-abstract-full').style.display = 'inline'; document.getElementById('1307.7967v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1307.7967v1-abstract-full" style="display: none;"> This report describes the scientific aims and potentials as well as the preliminary technical design of IRIDE, an innovative tool for multi-disciplinary investigations in a wide field of scientific, technological and industrial applications. IRIDE will be a high intensity 'particle factory', based on a combination of a high duty cycle radio-frequency superconducting electron linac and of high energy lasers. Conceived to provide unique research possibilities for particle physics, for condensed matter physics, chemistry and material science, for structural biology and industrial applications, IRIDE will open completely new research possibilities and advance our knowledge in many branches of science and technology. IRIDE will contribute to open new avenues of discoveries and to address most important riddles: What does matter consist of? What is the structure of proteins that have a fundamental role in life processes? What can we learn from protein structure to improve the treatment of diseases and to design more efficient drugs? But also how does an electronic chip behave under the effect of radiations? How can the heat flow in a large heat exchanger be optimized? The scientific potential of IRIDE is far reaching and justifies the construction of such a large facility in Italy in synergy with the national research institutes and companies and in the framework of the European and international research. It will impact also on R&D work for ILC, FEL, and will be complementarity to other large scale accelerator projects. IRIDE is also intended to be realized in subsequent stages of development depending on the assigned priorities. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.7967v1-abstract-full').style.display = 'none'; document.getElementById('1307.7967v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 July, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">270 pages</span> </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" 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