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

作者： Zhiyenbayev, Yertay Redjem, Walid Qarony, Wayesh Ivanov, Vsevolod Papapanos, Christos Liu, Wei Jhuria, Kaushalya Al Balushi, Zakaria Dhuey, Scott Schwartzberg, Adam Tan, Liang Z. Schenkel, Thomas Kanté, Boubacar Department of Electrical Engineering and Computer Sciences University of California Berkeley BerkeleyCA94720 United States Accelerator Technology and Applied Physics Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Department of Materials Science and Engineering University of California Berkeley BerkeleyCA94720 United States Materials Sciences Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Molecular Foundry Lawrence Berkeley National Laboratory BerkeleyCA94720 United States

We demonstrate the first all-silicon quantum light source, by embedding a single silicon-based defect within a silicon nanophotonic cavity, resulting in a 30-fold enhancement of luminescence and an 8-fold acceleration... 详细信息

ISBN: (纸本)9781957171296

关键词： Electron beam lithography Photonic crystal cavities Photonic crystals Quantum light sources Ring resonators Scanning electron microscopy

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High-Temperature Strong Nonreciprocal Thermal Radiation from Semiconductors

arXiv

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arXiv 2025年

作者： Nabavi, Bardia Ghalekohneh, Sina Jafari Shayegan, Komron J. Tervo, Eric J. Atwater, Harry Zhao, Bo Department of Mechanical and Aerospace Engineering University of Houston HoustonTX77204 United States Thomas J. Watson Laboratory of Applied Physics California Institute of Technology PasadenaCA91125 United States Department of Electrical Engineering California Institute of Technology PasadenaCA91125 United States Department of Electrical and Computer Engineering University of Wisconsin-Madison MadisonWI53706 United States Department of Mechanical Engineering University of Wisconsin-Madison MadisonWI53706 United States

Nonreciprocal thermal emitters that break the conventional Kirchhoff's law allow independent control of emissivity and absorptivity and promise exciting new functionalities in controlling heat flow for thermal and energy applications. In enabling some of these applications, nonreciprocal thermal emitters will unavoidably need to serve as hot emitters. Leveraging magneto-optical effects, degenerate semiconductors have been demonstrated as a promising optical material platform for nonreciprocal thermal radiation. However, existing modeling and experimental efforts are limited to near room temperature ( © 2025, CC BY.

关键词： Temperature distribution

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EllipsoNet: Deep-learning-enabled optical ellipsometry for complex thin films

arXiv

引用

arXiv 2022年

作者： Wang, Ziyang Lin, Yuxuan Cosmi Zhang, Kunyan Wu, Wenjing Huang, Shengxi Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Department of Electrical Engineering and Computer Sciences University of California BerkeleyCA94720 United States Department of Electrical Engineering The Pennsylvania State University University ParkPA16802 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States

Optical spectroscopy is indispensable for research and development in nanoscience and nanotechnology, microelectronics, energy, and advanced manufacturing. Advanced optical spectroscopy tools often require both specifically designed high-end instrumentation and intricate data analysis techniques. Beyond the common analytical tools, deep learning methods are well suited for interpreting high-dimensional and complicated spectroscopy data. They offer great opportunities to extract subtle and deep information about optical properties of materials with simpler optical setups, which would otherwise require sophisticated instrumentation. In this work, we propose a computational ellipsometry approach based on a conventional tabletop optical microscope and a deep learning model called EllipsoNet. Without any prior knowledge about the multilayer substrates, EllipsoNet can predict the complex refractive indices of thin films on top of these nontrivial substrates from experimentally measured optical reflectance spectra with high accuracies. This task was not feasible previously with traditional reflectometry or ellipsometry methods. Fundamental physical principles, such as the Kramers-Kronig relations, are spontaneously learned by the model without any further training. This approach enables in-operando optical characterization of functional materials within complex photonic structures or optoelectronic devices. © 2022, CC BY.

关键词： Refractive index

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Optimizing Marker Design to Improve Precision of Optical Camera-Based Rigid-Body Motion Tracking and Correction in Medical Imaging

Optimizing Marker Design to Improve Precision of Optical Cam...

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2021 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2021

作者： Fisher, Jonathan Kim, Chris C. Groll, Andrew Levin, Craig S. Stanford University Department of Electrical Engineering CA United States Stanford University Department of Computer Science CA United States Stanford University Department of Radiology Molecular Imaging Program CA United States Bioengineering at Stanford University Department of Radiology and by Courtesy Physics Electrical Engineering CA United States

ISBN: (纸本)9781665421133

In this work we evaluated the performance of a camera-based rigid body motion correction solution using a 2D checkerboard marker and a 3D encoded marker. The context of the results presented is in PET/MR imaging, but in principle this motion compensation method could be used in any type of medical imaging modality. A high precision, computer-controlled motion stage with four degrees of freedom was used to control the marker positions and orientations (a.k.a. 'poses'). Still images of the markers taken in different poses mimicking a patient moving her/his head from side to side, were used to assess performance of this method. Comparing the known stage motion to the estimated motion, our results indicate that the 2D marker achieves better angular accuracy while the 3D marker's translational (linear) accuracy is superior. For all axes, the angular error was less than 0.96, 0.35 [deg], and the translational error was less than 2.24, 4.76 [mm] for the 3D and 2D markers, respectively. © 2021 IEEE.

关键词： Medical imaging

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Scoring based genetic algorithm for wavefront shaping to optimize multiple objectives

Scoring based genetic algorithm for wavefront shaping to opt...

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Frontiers in Optics, FiO 2022

作者： Wang, Tianhong Rumman, Nazifa Bassène, Pascal N'Gom, Moussa Department of Physics Applied Physics and Astronomy Rensselaer Polytechnic Institute 110 8th street TroyNY12180 United States Electrical Computer and Systems Engineering Department Rensselaer Polytechnic Institute 110 8th street TroyNY12180 United States Center for Ultrafast Optical Sciences University of Michigan Ann ArborMI48109 United States

We present a scoring based genetic algorithm (GA) for wavefront shaping to obtain multiple objectives simultaneously. The algorithm treats a multi-objective optimization problem as a single objective one, hence is muc...

ISBN: (纸本)9781557528209

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Impact on mental health due to COVID-19 pandemic: A cross-sectional study in Bangladesh

引用

Clinical eHealth 2023年第1期6卷 42-52页

作者： Pathan, Refat Khan Biswas, Munmun Yasmin, Suraiya Uddin, Mohammad Amaz Das, Anindya Khandaker, Mayeen Uddin Faruque, M.R.I. Sarker, Moniruzzaman Dept. of Computing and Information Systems School of Engineering and Technology Sunway University Selangor Bandar Sunway 47500 Malaysia Dept. of Computer Science and Engineering BGC Trust University Bangladesh Chittagong 4381 Bangladesh Department of Computer and Information Science Tokyo University of Agriculture and Technology Koganei - 184-0012 Tokyo Japan Dept. of Computer Science and Engineering Chittagong University of Engineering and Technology Chittagong 4349 Bangladesh Dept. of Electrical and Electronic Engineering Chittagong University of Engineering and Technology Chittagong 4349 Bangladesh Center for Applied Physics and Radiation Technologies School of Engineering and Technology Sunway University Selangor Bandar Sunway 47500 Malaysia Space Science Centre Universiti Kebangsaan Malaysia 43600 UKM Selangor Bangi Malaysia Department of Marketing Sunway University Business School Sunway University Selangor Bandar Sunway 47500 Malaysia Faculty of Graduate Studies Daffodil International University Daffodil Smart City Birulia Savar Dhaka – 1216 Bangladesh

The government of Bangladesh has implemented the “Stay Home” policy following the WHO recommendation to resist the community transmission of Covid-19. As a result, the routine activities of all government, semi-government establishments, including educational institutions, are severely affected, and the country's economic growth becomes slowed down. To overcome such a situation, the relevant authorities have introduced the “Work from Home” policy for the employees and “Remote Education” for students. However, due to the persistence of multi-dimensional socio-economic problems, many employees and students face big challenges in performing their regular jobs while adopting such a policy. Consequently, enormous psychological anxiety has been developed for all people, including students, parents, employees, etc., and concurrently created severe changes in their behavior. This study aims to analyze the reasons for the behavioral changes of the employees, students, academic staff, and family members of different ages due to psychological anxiety, stress, or physical issues. A comprehensive online-based survey has been carried out on people working in various sectors in Bangladesh. A modified Apriori Algorithm has been used to sort out the associations between the causes and types of behavioral changes. Analyzed data revealed a massive human behavioral change in most participants. This finding indicates that the negligence of those significant human behavioral changes may cause a higher risk of creating psychological imbalance. Therefore, there is a need to have a solid understanding of the reasons for the behavioral changes and set up standard guidelines to maintain “Work from Home” in this Covid-19 situation to avoid psychological imbalance. Based on this study, some suggestions have been given for implementation by the government on an urgent basis. © 2023

关键词： Apriori algorithm Behavioral changes Covid-19 outbreak Family crisis Work from home

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GaN/SiC Upper F-Band Single Ended Power Amplifier

GaN/SiC Upper F-Band Single Ended Power Amplifier

引用

Microwave and Antenna Symposium (IMAS), International

作者： German Cortes Kevin T. Kornegay Willie L. Thompson II Michel Kornegay Ali Darwish ESI Directorate US Army DEVCOM C5ISR Center Aberdeen Proving Ground MD United States Department of Electrical and Computer Engineering Morgan State University Baltimore MD United States Air Missile Defense Sector Applied Physics Laboratory John Hopkins University Laurel MD United States Department of Electrical and Computer Engineering Johns Hopkins University Baltimore MD United States

ISBN: (数字)9798350356359

ISBN: (纸本)9798350356366

This article presents the design implementation, analysis and performance of a four-stage single ended power amplifier (PA) developed on a 40 nm gallium nitride on silicon carbide (GaN/SiC) technology. The circuit targets the upper F-Band, and it operates from 125 GHz to 130 GHz. At 130 GHz, the amplifier aims to have a small signal power gain $G$ p of 18 dB, peak power-added efficiency (PAE) of 10, and to achieve a saturated output power (PSat) of 27 dBm. Based on EM simulations this is the highest power level reported on this technology at the frequency of operation to date.

关键词： Microwave antennas Isolators Power measurement Silicon carbide Power amplifiers Integrated circuit modeling Probes Gallium nitride Gain Power generation

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High Efficiency and Optically Transparent 2D-MoS2 Heaters for Silicon Photonics

High Efficiency and Optically Transparent 2D-MoS2 Heaters fo...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Dor Oz Nathan Suleymanov Boris Minkovich Vladislav Kostianovskii Liron Gantz Dmitry Polyushkin Thomas Mueller Ilya Goykhman The Faculty of Science and The Center for Nanoscience and Nanotechnology Institute of Applied Physics The Hebrew University of Jerusalem Jerusalem Israel Department of Electrical and Computer Engineering Technion Haifa Israel NVIDIA Israel LTD Yokneam Israel Institute of Photonics Vienna University of Technology Vienna Austria

We experimentally demonstrate the first 1L-MoS2 microheater integrated with a silicon MRR, showing the best-reported power efficiency of ~7.5 mW/n with no significant penalty on insertion loss when placed close to the... 详细信息

ISBN: (纸本)9798350369311

关键词： Optical losses Heating systems Optical resonators Insertion loss Lasers and electrooptics Silicon photonics Electro-optical waveguides

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Gallium Oxide as Photonic Integrated Platforms in the UV–Visible Spectra

Gallium Oxide as Photonic Integrated Platforms in the UV–Vi...

引用

Conference on Lasers and Electro-Optics (CLEO)

作者： Jingan Zhou Xuan Zhao Rui Xu Xiang Zhang Kai Fu Tao Li Mingfei Xu Shisong Luo Ziyi He Jacob T. Robinson Hanyu Zhu Pulickel M. Ajayan Xiaodong Zhang Yuji Zhao Department of Electrical and Computer Engineering Rice University Houston TX USA Applied Physics Graduate Program Smalley-Curl Institute Rice University Houston TX USA Department of Materials Science and NanoEngineering Rice University Houston TX USA School of Electrical Computer and Energy Engineering Arizona State University Tempe Arizona USA Nanofabrication Facility Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou China

We report the Ga 2 O 3 as photonic integrated platforms and its nonlinear optical effects in the UV–visible spectra. A low propagation loss of 3.7 dB/cm and second-order susceptibility of χ (2) =4.89×10 -3 pm... 详细信息

ISBN: (纸本)9781957171258

关键词： Material properties Nonlinear effects Nonlinear susceptibility Optical components Thin films Visible light communications

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Opportunities and Challenges of Solid-State Quantum Nonlinear Optics

arXiv

引用

arXiv 2024年

作者： Kala, Abhinav Sharp, David Choi, Minho Manna, Arnab Deshmukh, Prathmesh Veetil, Vijin Kizhake Menon, Vinod Pelton, Matthew Waks, Edo Majumdar, Arka Department of Electrical and Computer Engineering University of Washington SeattleWA98195 United States Department of Physics University of Washington SeattleWA98195 United States Department of Physics The Graduate Center City University of New York NY10016 United States Department of Physics City College of New York City University of New York NY10031 United States Department of Physics UMBC University of Maryland Baltimore County BaltimoreMD21250 United States Institute for Research in Electronics and Applied Physics Joint Quantum Institute University of Maryland College ParkMD20742 United States Department of Electrical and Computer Engineering University of Maryland College ParkMD20740 United States

Nonlinear interactions between single quantum particles are at the heart of any quantum information system, including analog quantum simulation and fault-tolerant quantum computing. This remains a particularly difficult problem for photonic qubits, as photons do not interact with each other. While engineering light-matter interaction can effectively create photon-photon interaction, the required photon number to observe any nonlinearity is very high, where any quantum mechanical signature disappears. However, with emerging low-dimensional materials, and engineered photonic resonators, the photon number can be potentially reduced to reach the quantum nonlinear optical regime. In this review paper, we discuss different mechanisms exploited in solid-state platforms to attain quantum nonlinear optics. We review emerging materials and optical resonator architecture with different dimensionalities. We also present new research directions and open problems in this field. Copyright © 2024, The Authors. All rights reserved.

关键词： Photons

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