arXiv - PHYS - Optics最新文献

{"title":"Nonlocal phase-change metaoptics for reconfigurable nonvolatile image processing","authors":"Guoce Yang, Mengyun Wang, June Sang Lee, Nikolaos Farmakidis, Joe Shields, Carlota Ruiz de Galarreta, Stuart Kendall, Jacopo Bertolotti, Andriy Moskalenko, Kairan Huang, Andrea Alù, C. David Wright, Harish Bhaskaran","doi":"arxiv-2409.10976","DOIUrl":"https://doi.org/arxiv-2409.10976","url":null,"abstract":"The next generation of smart imaging and vision systems will require compact\u0000and tunable optical computing hardware to perform high-speed and low-power\u0000image processing. These requirements are driving the development of computing\u0000metasurfaces to realize efficient front-end analog optical pre-processors,\u0000especially for edge-detection capability. Yet, there is still a lack of\u0000reconfigurable or programmable schemes, which may drastically enhance the\u0000impact of these devices at the system level. Here, we propose and\u0000experimentally demonstrate a reconfigurable flat optical image processor using\u0000low-loss phase-change nonlocal metasurfaces. The metasurface is configured to\u0000realize different transfer functions in spatial frequency space, when\u0000transitioning the phase-change material between its amorphous and crystalline\u0000phases. This enables edge detection and bright-field imaging modes on the same\u0000device. The metasurface is compatible with a large numerical aperture of ~0.5,\u0000making it suitable for high resolution coherent optical imaging microscopy. The\u0000concept of phase-change reconfigurable nonlocal metasurfaces may enable\u0000emerging applications of artificial intelligence-assisted imaging and vision\u0000devices with switchable multitasking.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Convergent-beam attosecond X-ray crystallography","authors":"Henry N. Chapman, Chufeng Li, Saša Bajt, Mansi Butola, J. Lukas Dresselhaus, Dmitry Egorov, Holger Fleckenstein, Nikolay Ivanov, Antonia Kiene, Bjarne Klopprogge, Viviane Kremling, Philipp Middendorf, Dominik Oberthuer, Mauro Prasciolu, T. Emilie S. Scheer, Janina Sprenger, Jia Chyi Wong, Oleksandr Yefanov, Margarita Zakharova, Wenhui Zhang","doi":"arxiv-2409.11127","DOIUrl":"https://doi.org/arxiv-2409.11127","url":null,"abstract":"Sub-angstrom spatial resolution of electron density coupled with\u0000sub-femtosecond temporal resolution is required to directly observe the\u0000dynamics of the electronic structure of a molecule after photoinitiation or\u0000some other ultrafast perturbation. Meeting this challenge, pushing the field of\u0000quantum crystallography to attosecond timescales, would bring insights into how\u0000the electronic and nuclear degrees of freedom couple, enable the study of\u0000quantum coherences involved in molecular dynamics, and ultimately enable these\u0000dynamics to be controlled. Here we propose to reach this realm by employing\u0000convergent-beam X-ray crystallography with high-power attosecond pulses from a\u0000hard-X-ray free-electron laser. We show that with dispersive optics, such as\u0000multilayer Laue lenses of high numerical aperture, it becomes possible to\u0000encode time into the resulting diffraction pattern with deep sub-femtosecond\u0000precision. Each snapshot diffraction pattern consists of Bragg streaks that can\u0000be mapped back to arrival times and positions of X-rays on the face of a\u0000crystal. This can span tens of femtoseconds, and can be finely sampled as we\u0000demonstrate experimentally. The approach brings several other advantages, such\u0000as an increase of the number of observable reflections in a snapshot\u0000diffraction pattern, all fully integrated, to improve the speed and accuracy of\u0000serial crystallography -- especially for crystals of small molecules.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Label-free correlative morpho-chemical tomography of 3D kidney mesangial cells","authors":"Ankit Butola, Biswajoy Ghosh, Jaena Park, Minsung Kwon, Alejandro De la Cadena, Sudipta S Mukherjee, Rohit Bhargava, Stephen A Boppart, Krishna Agarwal","doi":"arxiv-2409.10971","DOIUrl":"https://doi.org/arxiv-2409.10971","url":null,"abstract":"Label-free characterization of biological specimens seeks to supplement\u0000existing imaging techniques and avoid the need for contrast agents that can\u0000disturb the native state of living samples. Conventional label-free optical\u0000imaging techniques are compatible with living samples but face challenges such\u0000as poor sectioning capability, fragmentary morphology, and lack chemical\u0000specific information. Here, we combined simultaneous label-free\u0000autofluorescence multi-harmonic (SLAM) microscopy and gradient light\u0000interference microscopy (GLIM) to extract both chemical specific and\u0000morphological tomography of 3D cultured kidney mesangial cells. Imaging 3D in\u0000vitro kidney models is essential to understand kidney function and pathology.\u0000Our correlative approach enables imaging and quantification of these cells to\u0000extract both morphology and chemical-specific signals that is crucial for\u0000understanding kidney function. In our approach, SLAM offers a nonlinear imaging\u0000platform with a single-excitation source to simultaneously acquire\u0000autofluorescence (FAD and NAD(P)H), second, and third harmonic signal from the\u00003D cultured cells. Complementarily, GLIM acquires high-contrast quantitative\u0000phase information to quantify structural changes in samples with thickness of\u0000up to 250 micron. Our correlative imaging results demonstrate a versatile and\u0000hassle-free platform for morpho-chemical cellular tomography to investigate\u0000functions such as metabolism and matrix deposition of kidney mesangial cells in\u00003D under controlled physiological conditions.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New interferometric aperture masking technique for full transverse beam characterization using synchrotron radiation","authors":"Ubaldo Iriso, Laura Torino, Chris Carilli, Bojan Nikolic, Nithyanandan Thyagarajan","doi":"arxiv-2409.11135","DOIUrl":"https://doi.org/arxiv-2409.11135","url":null,"abstract":"Emittance measurements using synchrotron radiation are usually performed\u0000using x-rays to avoid diffraction limits. Interferometric techniques using\u0000visible light are also used to measure either the horizontal or the vertical\u0000beam projection. Several measurements rotating the interferometry axis are\u0000needed to obtain a full beam reconstruction. In this report we present a new\u0000interferometric multi-aperture masking technique and data analysis, inspired by\u0000astronomical methods, that are able to provide a full 2-D transverse beam\u0000reconstruction in a single acquisition. Results of beam characterization\u0000obtained at ALBA synchrotron light source will also been shown.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Semi-analytical model of optothermal fluidics in a confinement","authors":"Tetsuro Tsuji, Shun Saito, Satoshi Taguchi","doi":"arxiv-2409.10837","DOIUrl":"https://doi.org/arxiv-2409.10837","url":null,"abstract":"In this paper, we provide the semi-analytical solution of the temperature and\u0000flow fields of a fluid confined in a narrow space between two parallel plates.\u0000The temperature increase is triggered by photothermal effects of fluids and/or\u0000boundaries due to the absorption of a focused Gaussian beam irradiated\u0000perpendicular to the fluid film, and then the temperature variation induces the\u0000flow fields through a buoyancy force and/or thermo-osmotic slip. The\u0000semi-analytical solution to this optothermal fluidic system is validated by\u0000comparing with the results of numerical simulation, and is applied to typical\u0000optothermal fluidic problems. In particular, the optothermal trap of\u0000nanoparticles observed in our previous experiment [T. Tsuji, et al.,\u0000Electrophoresis, 42, 2401 (2021)] is investigated in terms of thermophoretic\u0000force and flow drag that are obtained semi-analytically. The semi-analytical\u0000solution can be shared through open-source codes that are available to\u0000researchers without the background of fluid mechanics.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Universal radiation dynamics by temporal transitions in optical waveguides","authors":"Amir Shlivinski, Yakir Hadad","doi":"arxiv-2409.11526","DOIUrl":"https://doi.org/arxiv-2409.11526","url":null,"abstract":"When an excited electromagnetically open optical waveguide goes through a\u0000temporal transition of its material properties, it radiates to the ambient\u0000surroundings. In this letter, we explore this radiation and reveal, using\u0000asymptotic evaluation of path integral in the complex frequency (Laplace)\u0000plane, a peculiar space-time dependence of its frequency. Specifically, we\u0000derive an exact formula (Eq. (11)) for the instantaneous radiation frequency,\u0000which exhibits a chirp behavior with respect to time. This simple formula\u0000depends on the ambient properties and on the longitudinal wavenumber beta of\u0000the guided mode before the temporal transition but not on the specific\u0000waveguide structure or materials. In addition, we derive a t^(-3/2) decay rate\u0000of the radiative field on time. We verify our analytic results using full-wave\u0000simulations of a dispersive and lossy Indium Tin Oxide waveguide that undergoes\u0000smooth temporal long transitions over up to ~200 cycles at the initially guided\u0000mode frequency. Thus, these theoretical findings offer valuable insights into\u0000the behavior of general optical waveguides experiencing temporal transitions\u0000and provide a powerful tool for analyzing and designing such THz and optical\u0000setups, with potential use in sensing and imaging.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Observation of the Talbot effect from a surface acoustic wave dynamic grating","authors":"M. Fisicaro, Y. C. Doedes, T. A. Steenbergen, M. P. van Exter, W. Löffler","doi":"arxiv-2409.11161","DOIUrl":"https://doi.org/arxiv-2409.11161","url":null,"abstract":"We demonstrate the dynamical Talbot effect caused by optical diffraction from\u0000standing surface acoustic waves (SAWs). The Talbot effect is a wave\u0000interference phenomenon in the Fresnel regime, and we observe it with a\u0000fiber-based scanning optical interferometer on a SAW Fabry-Perot cavity. By\u0000studying the interferometric signal at 1 GHz, we first discover the existence\u0000of an amplitude-modulated term, that can exceed in magnitude the usual\u0000phase-modulated term, enabling a new way of imaging surface acoustic waves.\u0000Secondly, by displacing the acoustic device from the beam focus we reveal the\u0000optical Talbot effect, where despite the curved wavefronts of the optical\u0000field, the conventional Talbot length appears. As a consequence, the amplitude\u0000modulation vanishes at periodic positions of the acoustic wave relative to the\u0000beam focus.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Generation of tunable quantum entanglement via nonlinearity symmetry breaking in semiconductor metasurfaces","authors":"Jinyong Ma, Tongmiao Fan, Tuomas Haggren, Laura Valencia Molina, Matthew Parry, Saniya Shinde, Jihua Zhang, Rocio Camacho Morales, Frank Setzpfandt, Hark Hoe Tan, Chennupati Jagadish, Dragomir N. Neshev, Andrey A. Sukhorukov","doi":"arxiv-2409.10845","DOIUrl":"https://doi.org/arxiv-2409.10845","url":null,"abstract":"Tunable biphoton quantum entanglement generated from nonlinear processes is\u0000highly desirable for cutting-edge quantum technologies, yet its tunability is\u0000substantially constrained by the symmetry of material nonlinear tensors. Here,\u0000we overcome this constraint by introducing symmetry-breaking in nonlinear\u0000polarization to generate optically tunable biphoton entanglement at picosecond\u0000speeds. Asymmetric optical responses have made breakthroughs in classical\u0000applications like non-reciprocal light transmission. We now experimentally\u0000demonstrate the nonlinear asymmetry response for biphoton entanglement using a\u0000semiconductor metasurface incorporating [110] InGaP nano-resonators with\u0000structural asymmetry. We realize continuous tuning of polarization entanglement\u0000from near-unentangled states to a Bell state. This tunability can also extend\u0000to produce tailored hyperentanglement. Furthermore, our nanoscale entanglement\u0000source features an ultra-high coincidence-to-accidental ratio of\u0000$approx7times10^4$, outperforming existing semiconductor flat optics by two\u0000orders of magnitude. Introducing asymmetric nonlinear response in quantum\u0000metasurfaces opens new directions for tailoring on-demand quantum states and\u0000beyond.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mitigating tilt-induced artifacts in reflection ptychography via optimization of the tilt angles","authors":"Sander Senhorst, Yifeng Shao, Sven Weerdenburg, Roland Horsten, Christina Porter, Wim Coene","doi":"arxiv-2409.11251","DOIUrl":"https://doi.org/arxiv-2409.11251","url":null,"abstract":"Ptychography in a reflection geometry shows great promise for non-destructive\u0000imaging of 3-dimensional nanostructures at the surface of a thick substrate. A\u0000major challenge to obtain high quality reflection-ptychographic images under\u0000near-grazing conditions has been to calibrate the incidence angle used to\u0000straighten the measured curved diffraction patterns in a process referred to as\u0000'tilted plane correction' (TPC). In this work, we leverage the flexibility of\u0000automatic differentiation (AD)-based modeling to realise an alternative\u0000approach, where the tilted propagation is included into the forward model. Use\u0000of AD allows us to jointly optimize the tilt angles with the typical probe and\u0000object, eliminating the need for accurate calibration or random search\u0000optimization. The approach was validated using datasets generated with an\u0000extreme ultraviolet (EUV) beamline based on either a tabletop high harmonic\u0000generation (HHG) source or a visible laser. We demonstrate that the proposed\u0000approach can converge to a precision of $pm 0.05deg$ for probe beams at\u0000$70deg$ angle of incidence, possibly precise enough for use as a calibration\u0000approach. Furthermore, we demonstrate that optimizing for the tilt angles\u0000reduces artifacts and increases reconstruction fidelity. Use of AD not only\u0000streamlines the current ptychographic reconstruction process, but should also\u0000enable optimization of more complex models in other domains, which will\u0000undoubtedly be essential for future advancements in computational imaging.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Programmable multifunctional integrated microwave photonic circuit on thin-film lithium niobate","authors":"Chuangchuang WeiNonlinear Nanophotonics Group, MESA+ Institute of Nanotechnology, University of Twente, Enschede, Netherlands, Hanke FengDepartment of Electrical Engineering and State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Hong Kong, China, Kaixuan YeNonlinear Nanophotonics Group, MESA+ Institute of Nanotechnology, University of Twente, Enschede, Netherlands, Maarten EijkelNonlinear Nanophotonics Group, MESA+ Institute of Nanotechnology, University of Twente, Enschede, Netherlands, Yvan KlaverNonlinear Nanophotonics Group, MESA+ Institute of Nanotechnology, University of Twente, Enschede, Netherlands, Zhaoxi ChenDepartment of Electrical Engineering and State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Hong Kong, China, Akshay KelothNonlinear Nanophotonics Group, MESA+ Institute of Nanotechnology, University of Twente, Enschede, Netherlands, Cheng WangDepartment of Electrical Engineering and State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Hong Kong, China, David MarpaungNonlinear Nanophotonics Group, MESA+ Institute of Nanotechnology, University of Twente, Enschede, Netherlands","doi":"arxiv-2409.10227","DOIUrl":"https://doi.org/arxiv-2409.10227","url":null,"abstract":"Microwave photonics, with its advanced high-frequency signal processing\u0000capabilities, is expected to play a crucial role in next-generation wireless\u0000communications and radar systems. The realization of highly integrated,\u0000high-performance, and multifunctional microwave photonic links will pave the\u0000way for its widespread deployment in practical applications, which is a\u0000significant challenge. Here, leveraging thin-film lithium niobate intensity\u0000modulator and programmable cascaded microring resonators, we demonstrate for\u0000the first time a tunable microwave photonic notch filter that simultaneously\u0000achieves high level of integration along with high dynamic range, high link\u0000gain, low noise figure, and ultra-high rejection ratio. Additionally, this\u0000programmable on-chip system is multifunctional, allowing for the dual-band\u0000notch filter and the suppression of the high-power interference signal. This\u0000work demonstrates the potential applications of the thin-film lithium niobate\u0000platform in the field of high-performance integrated microwave photonic\u0000filtering and signal processing, facilitating the advancement of microwave\u0000photonic system towards practical applications.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}