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Frontiers in Optics + Laser Science 2023, FiO, LS 203: Part of Frontiers in Optics + Laser Science 2023

作者： Groman, William Kudelin, Igor Ji, Qing-Xin Guo, Joel Lee, Dahyeon Kelleher, Megan Nakamura, Takuma McLemore, Charles A. Jin, Warren Wu, Lue Zhang, Wei Campbell, Joe Matsko, Andrey Iltchenko, Vladimir Bowers, John Vahala, Kerry Quinlan, Frank Diddams, Scott A. Department of Physics University of Colorado BoulderCO United States Time and Frequency Division National Institute of Standards and Technology BoulderCO United States T.J. Watson Laboratory of Applied Physics California Institute of Technology PasadenaCA United States Department of Electrical and Computer Engineering University of California Santa BarbaraCA United States Jet Propulsion Laboratory California Institute of Technology PasadenaCA United States University of Virginia CharlottesvilleVA United States Department of Electrical Computer and Energy Engineering University of Colorado BoulderCO United States

Using photonic chip components and two-point optical frequency division, we generate a 20 GHz microwave signal with phase noise of −135 dBc/Hz at 10 kHz offset, decreasing to −139 dBc/Hz at 40 kHz offset. © Optic... 详细信息

ISBN: (纸本)9781957171296

关键词： Distributed feedback lasers Frequency combs Laser modes Laser systems Optical components Phase noise

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Testing External Polymer Insulation Materials for Resistance to electrical Tracing and Degradation Using the Inclined Plane Method 6

Testing External Polymer Insulation Materials for Resistance...

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6th International Conference on Contemporary Computing and Informatics, IC3I 2023

作者： Gupta, Ankur Kumar Padalia, Diwakar Gangwar, Arun Sharma, Sandeep Kamble, Sachin K Bhoite, Sonali Prashant School of Computer Science and Applications IIMT University Meerut India School of Basic& Applied Sciences Department of Physics K. R. Mangalam University Gurugram India Invertis University Department of Electrical Engineering Bareilly India School of Electronic and Electrical Engineering Dev Bhoomi Uttarakhand University Uttarakhand India Terna Engineering College Design Dept Navi Mumbai India Vishwakarma Institute of Information Technology Pune India

ISBN: (纸本)9798350304480

An important step in creating outdoor insulators is to assess the polymeric housing materials'resistance to weathering and electrical tracking. The terms 'erosion'and 'tracking'refer to the weight loss of the housing material and the production of a surface carbonaceous trail, respectively. With the help of the common tracking and erosion tests, composites can only be ranked relative to one another in terms of their tracking and erosion resistance, which makes it impossible to quantify these properties in absolute terms. Failure due to the track was a major issue during the early stages of the usage of organic insulating materials. The introduction of tracking-resistant composites with significant inorganic filler content has increased the importance of erosion. © 2023 IEEE.

关键词： DC predisposed exam are some of the terms that may be used erosion Inorganic fillers monitoring parched curving polymer insulator predisposed testing silicone rubber

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Thermal metasurface with tunable narrowband absorption from a hybrid graphene/silicon photonic crystal resonance

Thermal metasurface with tunable narrowband absorption from ...

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作者： Nagpal, Arun Zhou, Ming Ilic, Ognjen Yu, Zongfu Atwater, Harry A. Thomas J. Watson Laboratory of Applied Physics California Institute of Technology 1200 E. California Avenue PasadenaCA91125 United States Department of Electrical Engineering Stanford University 450 Serra Mall StanfordCA94305 United States Department of Mechanical Engineering University of Minnesota 111 Church Street SE MinneapolisMN55455 United States Department of Electrical and Computer Engineering University of Wisconsin 1415 Engineering Drive MadisonWI53706 United States

We report the design of a tunable, narrowband, thermal metasurface that employs a hybrid resonance generated by coupling a tunable permittivity graphene ribbon to a silicon photonic crystal. The gated graphene ribbon array, proximitized to a high quality factor Si photonic crystal supporting a guided mode resonance, exhibits tunable narrowband absorbance lineshapes (Q > 10,000). Actively tuned Fermi level modulation in graphene with applied gate voltage between high absorptivity and low absorptivity states gives rise to absorbance on/off ratios exceeding 60. We employ coupled-mode theory as a computationally efficient approach to elements of the metasurface design, demonstrating an orders of magnitude speedup over typical finite element computational methods. © 2023 Optica Publishing Group.

关键词： Absorbance

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The Photoinjector Laser System at LCLS-II

The Photoinjector Laser System at LCLS-II

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2024 Advanced Solid State Lasers, ASSL 2024

作者： Zhang, Hao Gilevich, Sasha Miahnahri, Alan Alverson, Shawn Brachmann, Axel Duris, Joseph Franz, Paris Fry, Alan Hirschman, Jack Larsen, Kirk Lemons, Randy Li, Siqi Lu, Brittany Marinelli, Agostino Martinez, Mikael May, Justin Milshtein, Erel Murari, Krishna Neveu, Nicole Robinson, Joseph Schmerge, John Sun, Linshan Vecchione, Theodore Xu, Chengcheng Zhou, Feng Carbajo, Sergio SLAC National Accelerator Laboratory Stanford University Menlo ParkCA94025 United States Department of Electrical and Computer Engineering University of California Los Angeles Los AngelesCA90095 United States Department of Applied Physics Stanford University Stanford University CA94305 United States Physics and Astronomy Department University of California Los Angeles Los AngelesCA90095 United States California NanoSystems Institute Los AngelesCA90095 United States

We present a thorough description of the LCLS-II photoinjector laser system, an instrument underpinning ultrafast X-ray *** presentation will highlight key components and advancements in generating high-quality, high-energy, ultrashort X-ray pulses in X-ray Free Electron Lasers. © Optica Publishing Group 2024, © 2024 The Author(s)

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Universal and Ultrafast Quantum Computation Based on Free-Electron-Polariton Blockade

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PRX Quantum 2024年第1期5卷 010339-010339页

作者： Aviv Karnieli Shai Tsesses Renwen Yu Nicholas Rivera Ady Arie Ido Kaminer Shanhui Fan Department of Applied Physics Stanford University Stanford California 94305 USA Department of Electrical Engineering Stanford University Stanford California 94305 USA Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Ramat Aviv 69978 Tel Aviv Israel Andrew and Erna Viterbi department of Electrical and Computer Engineering Technion – Israel Institute of Technology Haifa 32000 Israel Department of Physics and Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Department of Physics Harvard University Cambridge Massachusetts 02138 USA School of Electrical Engineering Fleischman Faculty of Engineering Tel Aviv University 69978 Tel Aviv Israel

Cavity QED, wherein a quantum emitter is coupled to electromagnetic cavity modes, is a powerful platform for implementing quantum sensors, memories, and networks. However, due to the fundamental trade-off between gate fidelity and execution time, as well as limited scalability, the use of cavity QED for quantum computation was overtaken by other architectures. Here, we introduce a new element into cavity QED—a free charged particle, acting as a flying qubit. Using free electrons as a specific example, we demonstrate that our approach enables ultrafast, deterministic, and universal discrete-variable quantum computation in a cavity-QED-based architecture, with potentially improved scalability. Our proposal hinges on a novel excitation blockade mechanism in a resonant interaction between a free-electron and a cavity polariton. This nonlinear interaction is faster by several orders of magnitude with respect to current photon-based cavity-QED gates, enjoys wide tunability and can demonstrate fidelities close to unity. Furthermore, our scheme is ubiquitous to any cavity nonlinearity, either due to light-matter coupling as in the Jaynes-Cummings model or due to photon-photon interactions as in a Kerr-type many-body system. In addition to promising advancements in cavity-QED quantum computation, our approach paves the way towards ultrafast and deterministic generation of highly entangled photonic graph states and is applicable to other quantum technologies involving cavity QED.

关键词： Atoms, ions, & molecules in cavities Cavity quantum electrodynamics Electron beams & optics Hybrid quantum systems Quantum computation Quantum description of light-matter interaction Quantum gates Quantum optics

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Simultaneous Optimization of Multiple Hidden Fluorescent Targets with Wavefront Shaping

Simultaneous Optimization of Multiple Hidden Fluorescent Tar...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Nazifa Rumman Tianhong Wang Pascal Bassène Moussa N’Gom Electrical Computer and Systems Engineering Department Rensselaer Polytechnic Institute Troy NY USA Department of Physics Applied Physics and Astronomy Rensselaer Polytechnic Institute Troy NY USA

We, for the first time, combine wavefront shaping together with thresholding based image segmentation and entropy of image to locate, optimize, and track signals from multiple targets hidden behind scattering media.

ISBN: (纸本)9781957171258

关键词： Image metrics Image processing Image quality Medical imaging Scattering media Segmentation

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Vortex Beams on Incoherent Background

Vortex Beams on Incoherent Background

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2023 Photonics North, PN 2023

作者： Xu, Zhiheng Hajati, Morteza Cai, Yangjian Popov, Sergei Liang, Chunhao Ponomarenko, Sergey A. Shandong Normal University Shandong Provincial Engineering and Technical Center of Light Manipulation Shandong Provincial Key Laboratory of Optics and Photonic Devices School of Physics and Electronics Jinan250014 China Dalhousie University Department of Electrical and Computer Engineering HalifaxNSB3J 2X4 Canada Kth Royal Institute of Technology Department of Applied Physics Stockholm106 91 Sweden

We introduce a novel class of structured random beams carrying orbital angular momentum on incoherent background. We confirm that such beams maintain their vortex structure in free space and manifest robust behavior a... 详细信息

ISBN: (纸本)9798350326734

关键词： Optical communication

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Study of Novel Photodetectors and Electronics to Enhance Coincidence Time Resolution of BGO-based PET Detectors

Study of Novel Photodetectors and Electronics to Enhance Coi...

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2022 IEEE Nuclear Science Symposium, Medical Imaging Conference, and Room Temperature Semiconductor Detector Conference, IEEE NSS MIC RTSD 2022

作者： Gonzalez-Montoro, Andrea Pourashraf, Shirin Cates, Joshua W Levin, Craig S Stanford University Department of Radiology StanfordCA94305 United States Lawrence Berkeley National Laboratory Applied Nuclear Physics Program BerkeleyCA94720 United States Stanford University Departments of Radiology Molecular Imaging Program Bioengineering Physics and Electrical Engineering CA94305 United States

ISBN: (纸本)9781665488723

Developing high sensitivity multiparametric medical imaging tools constitutes one of the main research topics in radionuclide *** time-of-flight positron emission tomography (TOF-PET) scanners have shown potential in this context. One of the most attractive solutions that have been proposed to improve the coincidence time resolution (CTR) of TOF-PET scanners includes exploiting the small population of promptly emitted light photons (i.e., Cherenkov photons). Bismuth germanate (BGO) is a legacy detection material for PET which exhibits a moderate Cherenkov yield. which new advancements in ultra-violet (UV) light sensitive photosensor technologies and associated detection techniques can exploit for fast timing. It has been demonstrated that exploiting the BGO-Cherenkov component may simultaneously facilitate high 511 keV photon detection sensitivity with excellent CTR, thus enabling high sensitivity, low cost TOF-PET systems. Accessing the timing information from these Cherenkov photons requires enhanced photodetector technology combined with low noise and fast readout electronics, as well as specific data post-processing *** this summary, we report the CTR evaluation of different length BGO crystals coupled to UV enhanced SiPMs and custom designed electronics. Average CTR values of 156 ± 6, 188 ± 5, 228 ± 8 and 297 ± 8 ps CTR FWHM have been achieved for 3 × 3 × 3, × 5, × 10, and × 15 mm3 BGO crystal with chemically processed surface finishes. © 2022 IEEE.

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Low-loss, nonvolatile tuning of Bragg structures with Sb2Se3

Low-loss, nonvolatile tuning of Bragg structures with Sb2Se3

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CLEO: Applications and Technology in CLEO 2024, CLEO: A and T 2024 - Part of Conference on Lasers and Electro-Optics

作者： Nobile, Nicholas A. Lian, Chuanyu Sun, Hongyi Huang, Yi-Siou Mills, Brian Popescu, Cosmin Constantin Callahan, Dennis Hu, Juejun Ríos Ocampo, Carlos A. Youngblood, Nathan Electrical & Computer Engineering Department University of Pittsburgh PittsburghPA15213 United States Department of Materials Science & Engineering University of Maryland College ParkMD20742 United States Institute for Research in Electronics and Applied Physics University of Maryland College ParkMD20742 United States Department of Materials Science & Engineering Massachusetts Institute of Technology CambridgeMA02139 United States Draper Scholar Program The Charles Stark Draper Laboratory Inc. CambridgeMA02139 United States The Charles Stark Draper Laboratory Inc. CambridgeMA02139 United States

Sb2Se3 is used to switch between broadband transparency and enhanced index contrast in two device types leveraging Bragg gratings for tunable stop- and pass-band functionalities. Experimental results highlight fabrication challenges and efficacy of the designs. © Optica Publishing Group 2024, © 2024 The Author(s)

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Giant Deep-Ultraviolet Circular Dichroism in Synthetic Architectures of Ordered Carbon Nanotubes

Giant Deep-Ultraviolet Circular Dichroism in Synthetic Archi...

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Doumani, Jacques Lou, Minhan Dewey, Oliver Hong, Nina Fan, Jichao Baydin, Andrey Pasquali, Matteo Yomogida, Yohei Yanagi, Kazuhiro Saito, Riichiro Kono, Junichiro Gao, Weilu Department of Electrical and Computer Engineering Rice University HoustonTX United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX United States Department of Electrical and Computer Engineering The University of Utah Salt Lake CityUT United States Carbon Hub Rice University HoustonTX United States Department of Chemical and Biomolecular Engineering Rice University HoustonTX United States J.A. Woollam Co. LincolnNE United States The Smalley-Curl Institute Rice University HoustonTX United States Department of Chemistry Rice University HoustonTX United States Department of Materials Science and NanoEngineering Rice University HoustonTX United States Department of Physics and Astronomy Tokyo Metropolitan University Tokyo Japan Department Physics Tohoku University Sendai Japan Department Physics and Astronomy Rice University HoustonTX United States

We demonstrate tunable, giant, and structure-induced deep-ultraviolet circular dichroism in macroscopically chiral assemblies of racemic carbon nanotubes prepared using two approaches: mechanical-rotation-assisted vac... 详细信息

ISBN: (纸本)9781957171258

关键词： Dichroism

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