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class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2411.11243">arXiv:2411.11243</a> <span> [<a href="https://arxiv.org/pdf/2411.11243">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</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"> Electron Phase Detection in Single Molecules by Interferometry </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Chen%2C+Z">Zhixin Chen</a>, <a href="/search/?searchtype=author&query=Deng%2C+J">Jie-Ren Deng</a>, <a href="/search/?searchtype=author&query=Wang%2C+M">Mengyun Wang</a>, <a href="/search/?searchtype=author&query=Farmakidis%2C+N">Nikolaos Farmakidis</a>, <a href="/search/?searchtype=author&query=Baugh%2C+J">Jonathan Baugh</a>, <a href="/search/?searchtype=author&query=Bhaskaran%2C+H">Harish Bhaskaran</a>, <a href="/search/?searchtype=author&query=Mol%2C+J+A">Jan A. Mol</a>, <a href="/search/?searchtype=author&query=Anderson%2C+H+L">Harry L. Anderson</a>, <a href="/search/?searchtype=author&query=Bogani%2C+L">Lapo Bogani</a>, <a href="/search/?searchtype=author&query=Thomas%2C+J+O">James O. Thomas</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="2411.11243v1-abstract-short" style="display: inline;"> Interferometry has underpinned a century of discoveries, ranging from the disproval of the ether theory to the detection of gravitational waves, offering insights into wave dynamics with unrivalled precision through the measurement of phase relationships. In electronics, phase-sensitive measurements can probe the nature of transmissive topological and quantum states, but are only possible using co… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.11243v1-abstract-full').style.display = 'inline'; document.getElementById('2411.11243v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.11243v1-abstract-full" style="display: none;"> Interferometry has underpinned a century of discoveries, ranging from the disproval of the ether theory to the detection of gravitational waves, offering insights into wave dynamics with unrivalled precision through the measurement of phase relationships. In electronics, phase-sensitive measurements can probe the nature of transmissive topological and quantum states, but are only possible using complex device structures in magnetic fields. Here we demonstrate electronic interferometry in a single-molecule device through the study of non-equilibrium Fano resonances. We show the phase difference between an electronic orbital and a coupled Fabry-Perot resonance are tuneable through electric fields, and consequently it is possible to read out quantum information in the smallest devices, offering new avenues for the coherent manipulation down to single molecules. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.11243v1-abstract-full').style.display = 'none'; document.getElementById('2411.11243v1-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> 17 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2409.10976">arXiv:2409.10976</a> <span> [<a href="https://arxiv.org/pdf/2409.10976">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="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> Nonlocal phase-change metaoptics for reconfigurable nonvolatile image processing </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Yang%2C+G">Guoce Yang</a>, <a href="/search/?searchtype=author&query=Wang%2C+M">Mengyun Wang</a>, <a href="/search/?searchtype=author&query=Lee%2C+J+S">June Sang Lee</a>, <a href="/search/?searchtype=author&query=Farmakidis%2C+N">Nikolaos Farmakidis</a>, <a href="/search/?searchtype=author&query=Shields%2C+J">Joe Shields</a>, <a href="/search/?searchtype=author&query=de+Galarreta%2C+C+R">Carlota Ruiz de Galarreta</a>, <a href="/search/?searchtype=author&query=Kendall%2C+S">Stuart Kendall</a>, <a href="/search/?searchtype=author&query=Bertolotti%2C+J">Jacopo Bertolotti</a>, <a href="/search/?searchtype=author&query=Moskalenko%2C+A">Andriy Moskalenko</a>, <a href="/search/?searchtype=author&query=Huang%2C+K">Kairan Huang</a>, <a href="/search/?searchtype=author&query=Al%C3%B9%2C+A">Andrea Al霉</a>, <a href="/search/?searchtype=author&query=Wright%2C+C+D">C. David Wright</a>, <a href="/search/?searchtype=author&query=Bhaskaran%2C+H">Harish Bhaskaran</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="2409.10976v1-abstract-short" style="display: inline;"> The next generation of smart imaging and vision systems will require compact and tunable optical computing hardware to perform high-speed and low-power image processing. These requirements are driving the development of computing metasurfaces to realize efficient front-end analog optical pre-processors, especially for edge-detection capability. Yet, there is still a lack of reconfigurable or progr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.10976v1-abstract-full').style.display = 'inline'; document.getElementById('2409.10976v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.10976v1-abstract-full" style="display: none;"> The next generation of smart imaging and vision systems will require compact and tunable optical computing hardware to perform high-speed and low-power image processing. These requirements are driving the development of computing metasurfaces to realize efficient front-end analog optical pre-processors, especially for edge-detection capability. Yet, there is still a lack of reconfigurable or programmable schemes, which may drastically enhance the impact of these devices at the system level. Here, we propose and experimentally demonstrate a reconfigurable flat optical image processor using low-loss phase-change nonlocal metasurfaces. The metasurface is configured to realize different transfer functions in spatial frequency space, when transitioning the phase-change material between its amorphous and crystalline phases. This enables edge detection and bright-field imaging modes on the same device. The metasurface is compatible with a large numerical aperture of ~0.5, making it suitable for high resolution coherent optical imaging microscopy. The concept of phase-change reconfigurable nonlocal metasurfaces may enable emerging applications of artificial intelligence-assisted imaging and vision devices with switchable multitasking. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.10976v1-abstract-full').style.display = 'none'; document.getElementById('2409.10976v1-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> 17 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">20 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/2304.14302">arXiv:2304.14302</a> <span> [<a href="https://arxiv.org/pdf/2304.14302">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Systems and Control">eess.SY</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/10.1038/s41467-023-38473-x">10.1038/s41467-023-38473-x <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> In-memory photonic dot-product engine with electrically programmable weight banks </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Zhou%2C+W">Wen Zhou</a>, <a href="/search/?searchtype=author&query=Dong%2C+B">Bowei Dong</a>, <a href="/search/?searchtype=author&query=Farmakidis%2C+N">Nikolaos Farmakidis</a>, <a href="/search/?searchtype=author&query=Li%2C+X">Xuan Li</a>, <a href="/search/?searchtype=author&query=Youngblood%2C+N">Nathan Youngblood</a>, <a href="/search/?searchtype=author&query=Huang%2C+K">Kairan Huang</a>, <a href="/search/?searchtype=author&query=He%2C+Y">Yuhan He</a>, <a href="/search/?searchtype=author&query=Wright%2C+C+D">C. David Wright</a>, <a href="/search/?searchtype=author&query=Pernice%2C+W+H+P">Wolfram H. P. Pernice</a>, <a href="/search/?searchtype=author&query=Bhaskaran%2C+H">Harish Bhaskaran</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="2304.14302v1-abstract-short" style="display: inline;"> Electronically reprogrammable photonic circuits based on phase-change chalcogenides present an avenue to resolve the von-Neumann bottleneck; however, implementation of such hybrid photonic-electronic processing has not achieved computational success. Here, we achieve this milestone by demonstrating an in-memory photonic-electronic dot-product engine, one that decouples electronic programming of ph… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.14302v1-abstract-full').style.display = 'inline'; document.getElementById('2304.14302v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2304.14302v1-abstract-full" style="display: none;"> Electronically reprogrammable photonic circuits based on phase-change chalcogenides present an avenue to resolve the von-Neumann bottleneck; however, implementation of such hybrid photonic-electronic processing has not achieved computational success. Here, we achieve this milestone by demonstrating an in-memory photonic-electronic dot-product engine, one that decouples electronic programming of phase-change materials (PCMs) and photonic computation. Specifically, we develop non-volatile electronically reprogrammable PCM memory cells with a record-high 4-bit weight encoding, the lowest energy consumption per unit modulation depth (1.7 nJ per dB) for Erase operation (crystallization), and a high switching contrast (158.5%) using non-resonant silicon-on-insulator waveguide microheater devices. This enables us to perform parallel multiplications for image processing with a superior contrast-to-noise ratio (greater than 87.36) that leads to an enhanced computing accuracy (standard deviation less than 0.007). An in-memory hybrid computing system is developed in hardware for convolutional processing for recognizing images from the MNIST database with inferencing accuracies of 86% and 87%. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.14302v1-abstract-full').style.display = 'none'; document.getElementById('2304.14302v1-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, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1811.07651">arXiv:1811.07651</a> <span> [<a href="https://arxiv.org/pdf/1811.07651">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="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> Plasmonic nanogap enhanced phase change devices with dual electrical-optical functionality </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Farmakidis%2C+N">Nikolaos Farmakidis</a>, <a href="/search/?searchtype=author&query=Youngblood%2C+N">Nathan Youngblood</a>, <a href="/search/?searchtype=author&query=Li%2C+X">Xuan Li</a>, <a href="/search/?searchtype=author&query=Tan%2C+J">James Tan</a>, <a href="/search/?searchtype=author&query=Swett%2C+J+L">Jacob L. Swett</a>, <a href="/search/?searchtype=author&query=Cheng%2C+Z">Zengguang Cheng</a>, <a href="/search/?searchtype=author&query=Wright%2C+D+C">David C Wright</a>, <a href="/search/?searchtype=author&query=Pernice%2C+W+H">Wolfram HP Pernice</a>, <a href="/search/?searchtype=author&query=Bhaskaran%2C+H">Harish Bhaskaran</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="1811.07651v1-abstract-short" style="display: inline;"> Modern-day computers use electrical signaling for processing and storing data which is bandwidth limited and power-hungry. These limitations are bypassed in the field of communications, where optical signaling is the norm. To exploit optical signaling in computing, however, new on-chip devices that work seamlessly in both electrical and optical domains are needed. Phase change devices can in princ… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.07651v1-abstract-full').style.display = 'inline'; document.getElementById('1811.07651v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1811.07651v1-abstract-full" style="display: none;"> Modern-day computers use electrical signaling for processing and storing data which is bandwidth limited and power-hungry. These limitations are bypassed in the field of communications, where optical signaling is the norm. To exploit optical signaling in computing, however, new on-chip devices that work seamlessly in both electrical and optical domains are needed. Phase change devices can in principle provide such functionality, but doing so in a single device has proved elusive due to conflicting requirements of size-limited electrical switching and diffraction-limited photonic devices. Here, we combine plasmonics, photonics and electronics to deliver a novel integrated phase-change memory and computing cell that can be electrically or optically switched between binary or multilevel states, and read-out in either mode, thus merging computing and communications technologies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.07651v1-abstract-full').style.display = 'none'; document.getElementById('1811.07651v1-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> 19 November, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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 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