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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/2408.03105">arXiv:2408.03105</a> <span> [<a href="https://arxiv.org/pdf/2408.03105">pdf</a>, <a href="https://arxiv.org/format/2408.03105">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link 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="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Revealing the Berry phase under the tunneling barrier </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Faeyrman%2C+L">Lior Faeyrman</a>, <a href="/search/cond-mat?searchtype=author&query=Molinero%2C+E+B">Eduardo B. Molinero</a>, <a href="/search/cond-mat?searchtype=author&query=Weiss%2C+R">Roni Weiss</a>, <a href="/search/cond-mat?searchtype=author&query=Narovlansky%2C+V">Vladimir Narovlansky</a>, <a href="/search/cond-mat?searchtype=author&query=Kneller%2C+O">Omer Kneller</a>, <a href="/search/cond-mat?searchtype=author&query=Arusi-Parpar%2C+T">Talya Arusi-Parpar</a>, <a href="/search/cond-mat?searchtype=author&query=Bruner%2C+B+D">Barry D. Bruner</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+B">Binghai Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Ivanov%2C+M">Misha Ivanov</a>, <a href="/search/cond-mat?searchtype=author&query=Smirnova%2C+O">Olga Smirnova</a>, <a href="/search/cond-mat?searchtype=author&query=Jimenez-Galan%2C+A">Alvaro Jimenez-Galan</a>, <a href="/search/cond-mat?searchtype=author&query=Piccoli%2C+R">Riccardo Piccoli</a>, <a href="/search/cond-mat?searchtype=author&query=Silva%2C+R+E+F">Rui E. F. Silva</a>, <a href="/search/cond-mat?searchtype=author&query=Dudovich%2C+N">Nirit Dudovich</a>, <a href="/search/cond-mat?searchtype=author&query=Uzan-Narovlansky%2C+A+J">Ayelet J. Uzan-Narovlansky</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="2408.03105v1-abstract-short" style="display: inline;"> In quantum mechanics, a quantum wavepacket may acquire a geometrical phase as it evolves along a cyclic trajectory in parameter space. In condensed matter systems, the Berry phase plays a crucial role in fundamental phenomena such as the Hall effect, orbital magnetism, and polarization. Resolving the quantum nature of these processes commonly requires sensitive quantum techniques, as tunneling, be… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.03105v1-abstract-full').style.display = 'inline'; document.getElementById('2408.03105v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2408.03105v1-abstract-full" style="display: none;"> In quantum mechanics, a quantum wavepacket may acquire a geometrical phase as it evolves along a cyclic trajectory in parameter space. In condensed matter systems, the Berry phase plays a crucial role in fundamental phenomena such as the Hall effect, orbital magnetism, and polarization. Resolving the quantum nature of these processes commonly requires sensitive quantum techniques, as tunneling, being the dominant mechanism in STM microscopy and tunneling transport devices. In this study, we integrate these two phenomena - geometrical phases and tunneling - and observe a complex-valued Berry phase via strong field light matter interactions in condensed matter systems. By manipulating the tunneling barrier, with attoseconds precision, we measure the imaginary Berry phase accumulated as the electron tunnels during a fraction of the optical cycle. Our work opens new theoretical and experimental directions in geometrical phases physics and their realization in condensed matter systems, expanding solid state strong field light metrology to study topological quantum phenomena. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.03105v1-abstract-full').style.display = 'none'; document.getElementById('2408.03105v1-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> 6 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2024. </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">17 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/2309.13003">arXiv:2309.13003</a> <span> [<a href="https://arxiv.org/pdf/2309.13003">pdf</a>, <a href="https://arxiv.org/format/2309.13003">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 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/s41566-022-01010-1">10.1038/s41566-022-01010-1 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Observation of light driven band structure via multi-band high harmonic spectroscopy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Uzan-Narovlansky%2C+A+J">Ayelet J. Uzan-Narovlansky</a>, <a href="/search/cond-mat?searchtype=author&query=Jim%C3%A9nez-Gal%C3%A1n%2C+%C3%81">脕lvaro Jim茅nez-Gal谩n</a>, <a href="/search/cond-mat?searchtype=author&query=Orenstein%2C+G">Gal Orenstein</a>, <a href="/search/cond-mat?searchtype=author&query=Silva%2C+R+E+F">Rui E. F. Silva</a>, <a href="/search/cond-mat?searchtype=author&query=Arusi-Parpar%2C+T">Talya Arusi-Parpar</a>, <a href="/search/cond-mat?searchtype=author&query=Shames%2C+S">Sergei Shames</a>, <a href="/search/cond-mat?searchtype=author&query=Bruner%2C+B+D">Barry D. Bruner</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+B">Binghai Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Smirnova%2C+O">Olga Smirnova</a>, <a href="/search/cond-mat?searchtype=author&query=Ivanov%2C+M">Misha Ivanov</a>, <a href="/search/cond-mat?searchtype=author&query=Dudovich%2C+N">Nirit Dudovich</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="2309.13003v1-abstract-short" style="display: inline;"> Intense light-matter interactions have revolutionized our ability to probe and manipulate quantum systems at sub-femtosecond time scales, opening routes to all-optical control of electronic currents in solids at petahertz rates. Such control typically requires electric field amplitudes $\sim V/脜$, when the voltage drop across a lattice site becomes comparable to the characteristic band gap energie… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.13003v1-abstract-full').style.display = 'inline'; document.getElementById('2309.13003v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2309.13003v1-abstract-full" style="display: none;"> Intense light-matter interactions have revolutionized our ability to probe and manipulate quantum systems at sub-femtosecond time scales, opening routes to all-optical control of electronic currents in solids at petahertz rates. Such control typically requires electric field amplitudes $\sim V/脜$, when the voltage drop across a lattice site becomes comparable to the characteristic band gap energies. In this regime, intense light-matter interaction induces significant modifications of electronic and optical properties, dramatically modifying the crystal band structure. Yet, identifying and characterizing such modifications remains an outstanding problem. As the oscillating electric field changes within the driving field's cycle, does the band-structure follow, and how can it be defined? Here we address this fundamental question, proposing all-optical spectroscopy to probe laser-induced closing of the band-gap between adjacent conduction bands. Our work reveals the link between nonlinear light matter interactions in strongly driven crystals and the sub-cycle modifications in their effective band structure. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.13003v1-abstract-full').style.display = 'none'; document.getElementById('2309.13003v1-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> 22 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Photonics 16 428-432 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.12564">arXiv:2302.12564</a> <span> [<a href="https://arxiv.org/pdf/2302.12564">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"> Valleytronics in bulk MoS$_2$ by optical control of parity and time symmetries </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Tyulnev%2C+I">Igor Tyulnev</a>, <a href="/search/cond-mat?searchtype=author&query=Jim%C3%A9nez-Gal%C3%A1n%2C+%C3%81">脕lvaro Jim茅nez-Gal谩n</a>, <a href="/search/cond-mat?searchtype=author&query=Poborska%2C+J">Julita Poborska</a>, <a href="/search/cond-mat?searchtype=author&query=Vamos%2C+L">Lenard Vamos</a>, <a href="/search/cond-mat?searchtype=author&query=Silva%2C+R+F">Rui F. Silva</a>, <a href="/search/cond-mat?searchtype=author&query=Russell%2C+P+S+J">Philip St. J. Russell</a>, <a href="/search/cond-mat?searchtype=author&query=Tani%2C+F">Francesco Tani</a>, <a href="/search/cond-mat?searchtype=author&query=Smirnova%2C+O">Olga Smirnova</a>, <a href="/search/cond-mat?searchtype=author&query=Ivanov%2C+M">Misha Ivanov</a>, <a href="/search/cond-mat?searchtype=author&query=Biegert%2C+J">Jens Biegert</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="2302.12564v1-abstract-short" style="display: inline;"> The valley degree of freedom of electrons in materials promises routes toward energy-efficient information storage with enticing prospects towards quantum information processing. Current challenges in utilizing valley polarization are symmetry conditions that require monolayer structures or specific material engineering, non-resonant optical control to avoid energy dissipation, and the ability to… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.12564v1-abstract-full').style.display = 'inline'; document.getElementById('2302.12564v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.12564v1-abstract-full" style="display: none;"> The valley degree of freedom of electrons in materials promises routes toward energy-efficient information storage with enticing prospects towards quantum information processing. Current challenges in utilizing valley polarization are symmetry conditions that require monolayer structures or specific material engineering, non-resonant optical control to avoid energy dissipation, and the ability to switch valley polarization at optical speed. We demonstrate all-optical and non-resonant control over valley polarization using bulk MoS$_2$, a centrosymmetric material with zero Berry curvature at the valleys. Our universal method utilizes spin-angular momentum-shaped tri-foil optical control pulses to switch the material's electronic topology to induce valley polarization by transiently breaking time and space inversion symmetry through a simple phase rotation. The dependence of the generation of the second harmonic of an optical probe pulse on the phase rotation directly demonstrates the efficacy of valley polarization. It shows that direct optical control over the valley degree of freedom is not limited to monolayer structures. Instead, it is possible for systems with an arbitrary number of layers and bulk materials. Universal and non-resonant valley control at optical speeds unlocks the possibility of engineering efficient, multi-material valleytronic devices operating on quantum coherent timescales. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.12564v1-abstract-full').style.display = 'none'; document.getElementById('2302.12564v1-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 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 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">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/2212.06134">arXiv:2212.06134</a> <span> [<a href="https://arxiv.org/pdf/2212.06134">pdf</a>, <a href="https://arxiv.org/format/2212.06134">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> </div> <p class="title is-5 mathjax"> Optical alignment and orientation of excitons in ensemble of core/shell CdSe/CdS colloidal nanoplatelets </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Smirnova%2C+O+O">O. O. Smirnova</a>, <a href="/search/cond-mat?searchtype=author&query=Kalitukha%2C+I+V">I. V. Kalitukha</a>, <a href="/search/cond-mat?searchtype=author&query=Rodina%2C+A+V">A. V. Rodina</a>, <a href="/search/cond-mat?searchtype=author&query=Dimitriev%2C+G+S">G. S. Dimitriev</a>, <a href="/search/cond-mat?searchtype=author&query=Sapega%2C+V+F">V. F. Sapega</a>, <a href="/search/cond-mat?searchtype=author&query=Ken%2C+O+S">O. S. Ken</a>, <a href="/search/cond-mat?searchtype=author&query=Korenev%2C+V+L">V. L. Korenev</a>, <a href="/search/cond-mat?searchtype=author&query=Kozyrev%2C+N+V">N. V. Kozyrev</a>, <a href="/search/cond-mat?searchtype=author&query=Nekrasov%2C+S+V">S. V. Nekrasov</a>, <a href="/search/cond-mat?searchtype=author&query=Kusrayev%2C+Y+G">Yu. G. Kusrayev</a>, <a href="/search/cond-mat?searchtype=author&query=Yakovlev%2C+D+R">D. R. Yakovlev</a>, <a href="/search/cond-mat?searchtype=author&query=Dubertret%2C+B">B. Dubertret</a>, <a href="/search/cond-mat?searchtype=author&query=Bayer%2C+M">M. Bayer</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="2212.06134v1-abstract-short" style="display: inline;"> We report on the experimental and theoretical studies of optical alignment and optical orientation effects in an ensemble of core/shell CdSe/CdS colloidal nanoplatelets. The dependences of three Stokes parameters on the magnetic field applied in the Faraday geometry are measured under continuous wave resonant excitation of the exciton photoluminescence. Theoretical model is developed to take into… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.06134v1-abstract-full').style.display = 'inline'; document.getElementById('2212.06134v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2212.06134v1-abstract-full" style="display: none;"> We report on the experimental and theoretical studies of optical alignment and optical orientation effects in an ensemble of core/shell CdSe/CdS colloidal nanoplatelets. The dependences of three Stokes parameters on the magnetic field applied in the Faraday geometry are measured under continuous wave resonant excitation of the exciton photoluminescence. Theoretical model is developed to take into account both bright and dark exciton states in the case of strong electron and hole exchange interaction and random in-plane orientation of the nanoplatelets in ensemble. The data analysis allows us to estimate the time and energy parameters of the bright and dark excitons. The optical alignment effect enables identification of the exciton and trion contributions to the photoluminescence spectrum even in the absence of a clear spectral line resolution. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.06134v1-abstract-full').style.display = 'none'; document.getElementById('2212.06134v1-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> 12 December, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">main paper (17 pages) and SI (6 pages)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2209.04928">arXiv:2209.04928</a> <span> [<a href="https://arxiv.org/pdf/2209.04928">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> <p class="title is-5 mathjax"> Polarization-Shaped Strong Field Control over Valley Polarization with Mid-IR Light </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Tyulnev%2C+I">Igor Tyulnev</a>, <a href="/search/cond-mat?searchtype=author&query=Poborska%2C+J">Julita Poborska</a>, <a href="/search/cond-mat?searchtype=author&query=Jim%C3%A9nez-Gal%C3%A1n%2C+%C3%81">脕lvaro Jim茅nez-Gal谩n</a>, <a href="/search/cond-mat?searchtype=author&query=Vamos%2C+L">Lenard Vamos</a>, <a href="/search/cond-mat?searchtype=author&query=Smirnova%2C+O">Olga Smirnova</a>, <a href="/search/cond-mat?searchtype=author&query=Ivanov%2C+M">Mikhail Ivanov</a>, <a href="/search/cond-mat?searchtype=author&query=Biegert%2C+J">Jens Biegert</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="2209.04928v1-abstract-short" style="display: inline;"> We induce control over valley polarization with a polarization-shaped mid-infrared light field. The polarization state of the trefoil-shaped pump fields is measured by high harmonic spectroscopy, which we also use to confirm strong field control over non-resonant valley polarization in MoS$_{2}$. </span> <span class="abstract-full has-text-grey-dark mathjax" id="2209.04928v1-abstract-full" style="display: none;"> We induce control over valley polarization with a polarization-shaped mid-infrared light field. The polarization state of the trefoil-shaped pump fields is measured by high harmonic spectroscopy, which we also use to confirm strong field control over non-resonant valley polarization in MoS$_{2}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.04928v1-abstract-full').style.display = 'none'; document.getElementById('2209.04928v1-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> 11 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2208.04647">arXiv:2208.04647</a> <span> [<a href="https://arxiv.org/pdf/2208.04647">pdf</a>, <a href="https://arxiv.org/format/2208.04647">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Sub-cycle multidimensional spectroscopy of strongly correlated materials </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Valmispild%2C+V">V. Valmispild</a>, <a href="/search/cond-mat?searchtype=author&query=Gorelov%2C+E">E. Gorelov</a>, <a href="/search/cond-mat?searchtype=author&query=Eckstein%2C+M">M. Eckstein</a>, <a href="/search/cond-mat?searchtype=author&query=Lichtenstein%2C+A">A. Lichtenstein</a>, <a href="/search/cond-mat?searchtype=author&query=Aoki%2C+H">H. Aoki</a>, <a href="/search/cond-mat?searchtype=author&query=Katsnelson%2C+M">M. Katsnelson</a>, <a href="/search/cond-mat?searchtype=author&query=Ivanov%2C+M">M. Ivanov</a>, <a href="/search/cond-mat?searchtype=author&query=Smirnova%2C+O">O. Smirnova</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="2208.04647v2-abstract-short" style="display: inline;"> Strongly correlated solids are extremely complex and fascinating quantum systems, where new states continue to emerge, especially when interaction with light triggers interplay between them. In this interplay, sub-laser-cycle electron response is particularly attractive as a tool for ultrafast manipulation of matter at PHz scale. Here we introduce a new type of non-linear multidimensional spectros… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.04647v2-abstract-full').style.display = 'inline'; document.getElementById('2208.04647v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2208.04647v2-abstract-full" style="display: none;"> Strongly correlated solids are extremely complex and fascinating quantum systems, where new states continue to emerge, especially when interaction with light triggers interplay between them. In this interplay, sub-laser-cycle electron response is particularly attractive as a tool for ultrafast manipulation of matter at PHz scale. Here we introduce a new type of non-linear multidimensional spectroscopy, which allows us to unravel the sub-cycle dynamics of strongly correlated systems interacting with few-cycle infrared pulses and the complex interplay between different correlated states evolving on the sub-femtosecond time-scale. We demonstrate that single particle sub-cycle electronic response is extremely sensitive to correlated many-body dynamics and provides direct access to many body response functions. For the two-dimensional Hubbard model under the influence of ultra-short, intense electric field transients, we demonstrate that our approach can resolve pathways of charge and energy flow between localized and delocalized many-body states on the sub-cycle time scale and follow the creation of a highly correlated state surviving after the end of the laser pulse. Our findings open a way towards a regime of imaging and manipulating strongly correlated materials at optical rates, beyond the multi-cycle approach employed in Floquet engineering, with the sub-cycle response being a key tool for accessing many body phenomena. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2208.04647v2-abstract-full').style.display = 'none'; document.getElementById('2208.04647v2-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> 10 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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">10 pages, 4, figures, Methods (5 pages), Supplementary information (4 figures, 4 pages)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2005.10196">arXiv:2005.10196</a> <span> [<a href="https://arxiv.org/pdf/2005.10196">pdf</a>, <a href="https://arxiv.org/format/2005.10196">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"> Sub-cycle valleytronics: control of valley polarization using few-cycle linearly polarized pulses </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Jim%C3%A9nez-Gal%C3%A1n%2C+%C3%81">脕lvaro Jim茅nez-Gal谩n</a>, <a href="/search/cond-mat?searchtype=author&query=Silva%2C+R">Rui Silva</a>, <a href="/search/cond-mat?searchtype=author&query=Smirnova%2C+O">Olga Smirnova</a>, <a href="/search/cond-mat?searchtype=author&query=Ivanov%2C+M">Misha Ivanov</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="2005.10196v1-abstract-short" style="display: inline;"> So far, selective excitation of a desired valley in the Brillouin zone of a hexagonal two-dimensional material has relied on using circularly polarized fields. We theoretically demonstrate a way to induce, control, and read valley polarization in hexagonal 2D materials on a few-femtosecond timescale using a few-cycle, linearly polarized pulse with controlled carrier-envelope phase. The valley pseu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.10196v1-abstract-full').style.display = 'inline'; document.getElementById('2005.10196v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2005.10196v1-abstract-full" style="display: none;"> So far, selective excitation of a desired valley in the Brillouin zone of a hexagonal two-dimensional material has relied on using circularly polarized fields. We theoretically demonstrate a way to induce, control, and read valley polarization in hexagonal 2D materials on a few-femtosecond timescale using a few-cycle, linearly polarized pulse with controlled carrier-envelope phase. The valley pseudospin is encoded in the helicity of the emitted high harmonics of the driving pulse, allowing one to avoid additional probe pulses and permitting one to induce, manipulate and read the valley pseudospin all-optically, in one step. High circularity of the harmonic emission offers a method to generate highly elliptic attosecond pulses with a linearly polarized driver, in an all-solid-state setup. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.10196v1-abstract-full').style.display = 'none'; document.getElementById('2005.10196v1-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> 20 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1910.07398">arXiv:1910.07398</a> <span> [<a href="https://arxiv.org/pdf/1910.07398">pdf</a>, <a href="https://arxiv.org/format/1910.07398">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 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/s41566-020-00717-3">10.1038/s41566-020-00717-3 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Lightwave topology for strong-field valleytronics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Jim%C3%A9nez-Gal%C3%A1n%2C+%C3%81">脕. Jim茅nez-Gal谩n</a>, <a href="/search/cond-mat?searchtype=author&query=Silva%2C+R+E+F">R. E. F. Silva</a>, <a href="/search/cond-mat?searchtype=author&query=Smirnova%2C+O">O. Smirnova</a>, <a href="/search/cond-mat?searchtype=author&query=Ivanov%2C+M">M. Ivanov</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="1910.07398v2-abstract-short" style="display: inline;"> Modern light generation technology offers extraordinary capabilities for sculpting light pulses, with full control over individual electric field oscillations within each laser cycle. These capabilities are at the core of lightwave electronics - the dream of ultrafast lightwave control over electron dynamics in solids, on a few-cycle to sub-cycle timescale, aiming at information processing at tera… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.07398v2-abstract-full').style.display = 'inline'; document.getElementById('1910.07398v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1910.07398v2-abstract-full" style="display: none;"> Modern light generation technology offers extraordinary capabilities for sculpting light pulses, with full control over individual electric field oscillations within each laser cycle. These capabilities are at the core of lightwave electronics - the dream of ultrafast lightwave control over electron dynamics in solids, on a few-cycle to sub-cycle timescale, aiming at information processing at tera-Hertz to peta-Hertz rates. Here we show a robust and general approach to valley-selective electron excitations in two-dimensional solids, by controlling the sub-cycle structure of non-resonant driving fields at a few-femtosecond timescale. Bringing the frequency-domain concept of topological Floquet systems to the few-fsec time domain, we develop a transparent control mechanism in real space and an all-optical, non-element-specific method to coherently write, manipulate and read selective valley excitations using fields carried in a wide range of frequencies, on timescales that can be much shorter than the valley lifetime, crucial for implementation of valleytronic devices. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.07398v2-abstract-full').style.display = 'none'; document.getElementById('1910.07398v2-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 February, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1704.08471">arXiv:1704.08471</a> <span> [<a href="https://arxiv.org/pdf/1704.08471">pdf</a>, <a href="https://arxiv.org/format/1704.08471">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link 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/s41566-018-0129-0">10.1038/s41566-018-0129-0 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> High harmonic imaging of ultrafast many-body dynamics in strongly correlated systems </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Silva%2C+R+E+F">R. E. F. Silva</a>, <a href="/search/cond-mat?searchtype=author&query=Blinov%2C+I+V">Igor V. Blinov</a>, <a href="/search/cond-mat?searchtype=author&query=Rubtsov%2C+A+N">Alexey N. Rubtsov</a>, <a href="/search/cond-mat?searchtype=author&query=Smirnova%2C+O">O. Smirnova</a>, <a href="/search/cond-mat?searchtype=author&query=Ivanov%2C+M">M. Ivanov</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="1704.08471v1-abstract-short" style="display: inline;"> This Letter brings together two topics that, until now, have been the focus of intense but non-overlapping research efforts. The first concerns high harmonic generation in solids, which occurs when intense light field excites highly non-equilibrium electronic response in a semiconductor or a dielectric. The second concerns many-body dynamics in strongly correlated systems such as the Mott insulato… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.08471v1-abstract-full').style.display = 'inline'; document.getElementById('1704.08471v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1704.08471v1-abstract-full" style="display: none;"> This Letter brings together two topics that, until now, have been the focus of intense but non-overlapping research efforts. The first concerns high harmonic generation in solids, which occurs when intense light field excites highly non-equilibrium electronic response in a semiconductor or a dielectric. The second concerns many-body dynamics in strongly correlated systems such as the Mott insulator. Here we show that high harmonic generation can be used to time-resolve ultrafast many-body dynamics associated with optically driven phase transition, with accuracy far exceeding one cycle of the driving light field. Our work paves the way for time-resolving highly non-equilibrium many body dynamics in strongly correlated systems, with few femtosecond accuracy. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.08471v1-abstract-full').style.display = 'none'; document.getElementById('1704.08471v1-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> 27 April, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Photonics, 12, 266 (2018) </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 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