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arXiv 2024年

作者： Puel, Tharnier O. Turflinger, Adam T. Horvath, Sebastian P. Thompson, Jeff D. Flatté, Michael E. Department of Physics and Astronomy University of Iowa IA52242 United States Department of Electrical and Computer Engineering Princeton University NJ08544 United States Department of Applied Physics Eindhoven University of Technology Eindhoven Netherlands

We propose a new method for converting single microwave photons to single optical sideband photons based on spinful impurities in magnetic materials. This hybrid system is advantageous over previous proposals because (i) the implementation allows much higher transduction rates (103 times faster at the same optical pump Rabi frequency) than state-of the art devices, (ii) high-efficiency transduction is found to happen in a significantly larger space of device parameters (in particular, over 1 GHz microwave detuning), and (iii) it does not require mode volume matching between optical and microwave resonators. We identify the needed magnetic interactions as well as potential materials systems to enable this speed-up using erbium dopants for telecom compatibility. This is an important step towards realizing high-fidelity entangling operations between remote qubits and will provide additional control of the transduction through perturbation of the magnet. Copyright © 2024, The Authors. All rights reserved.

关键词： Microwave resonators

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Optical Teleportation using Electro-Optic Plasmonic Graphene Waveguide

Optical Teleportation using Electro-Optic Plasmonic Graphene...

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CLEO: Science and Innovations, S and I 2022

作者： Qasymeh, Montasir Asjad, Muhammad Eleuch, Hichem Electrical and Computer Engineering Department Abu Dhabi University United Arab Emirates Department of Applied Physics and Astronomy University of Sharjah Sharjah United Arab Emirates Institute for Quantum Science and Engineering Texas AM University Texas United States

We demonstrate that optical teleportation can be realized by using two interacting optical fields in an electrically driven graphene waveguide. The simulations show that the proposed system can achieve high-fidelity t... 详细信息

ISBN: (纸本)9781557528209

关键词： Waveguides

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Spatially-Diverse Point-to-MultiPoint Optical Distribution Network for Enhanced 6G Fronthaul

Spatially-Diverse Point-to-MultiPoint Optical Distribution N...

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International Conference on Photonics in Switching (PS)

作者： Christos Christofidis Georgios Gorgias Haris Georgopoulos Konstantinos Moschopoulos Dan M. Marom Ioannis Tomkos Department of Electrical and Computer Engineering University of Patras Patras Greece Institute of Applied Physics The Hebrew University of Jerusalem Jerusalem Israel

We propose a novel Spatially-Diverse Point-to-MultiPoint (SDPtMP) approach for the fronthaul, utilizing sharp interleaver filter network instead of traditional splitters. This approach leads to distribution of subcarrier groupings from multiple sources to each antenna site in lossless fashion, offering enhanced functionality and higher energy efficiency as it eliminates the need for signal amplification which complements splitters-based architectures. The proposed architecture enables diverse connectivity among multiple Radio Units of a Radio Access Network through spatial, wavelength and subcarrier degrees of networking. According to the simulation results conducted in this study, the optimal values for the subcarrier baud rate is within the range of 3.125 GHz to 3.5 GHz, when spaced at 4 GHz and confined within the sharp interleavers. The proposed architecture offers an overall capacity of 336Gbps per wavelength and spatial dimension.

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Interdigital CPW Metamaterial Surfaces for Modern Wireless Communication Systems

Interdigital CPW Metamaterial Surfaces for Modern Wireless C...

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2023 IEEE International Symposium on Antennas and Propagation, ISAP 2023

作者： Chomtong, Pongsathorn Krachodnok, Piyaporn Chudpooti, Nonchanutt Akkaraekthalin, Prayoot Department of Teacher Training in Electrical Engineering Faculty of Technical Education King Mongkut’s University of Technology North Bangkok Bangkok10800 Thailand Institute of Engineering School of Telecommunication Engineering Suranaree University of Technology Nakhon Ratchasima Thailand Department of Industrial Physics and Medical Instrumentation Faculty of Applied Science King Mongkut’s University of Technology North Bangkok Bangkok10800 Thailand Department of Electrical and Computer Engineering Faculty of Engineering King Mongkut’s University of Technology North Bangkok Bangkok10800 Thailand

ISBN: (纸本)9798350341140

This paper proposes the design of metamaterial surfaces based on interdigital coplanar waveguide (CPW) unit cells. By using this technique, the unit cell can have negative permeability with size reduction to λ/8. The result causes from the slow wave effect on transmission line in the structure, which electrical and physical lengths of transmission line are not equal from that effect. The proposed matamaterial surfaces at some resonant frequencies have been designed and used as reflectors and directors applied for antenna applications. Using the designed reflectors or directors, the antenna performances have been increased. The proposed metamaterial surfaces will be appropriate for modern wireless communication systems. © 2023 IEEE.

关键词： director interdigital CPW unit cell metamaterial reflector metamaterial surface

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Nanophotonic-structured front contact for high-performance perovskite solar cells

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Science China Materials 2022年第7期65卷 1727-1740页

作者： Md.Akhtaruzzaman Mohammad Ismail Hossain Mohammad Aminul Islam Md.Shahiduzzaman Ghulam Muhammad A.K.Mahmud Hasan Yuen Hong Tsang Kamaruzzaman Sopian Solar Energy Research Institute(SERI) Universiti Kebangsaan Malaysia43600 BangiSelangorMalaysia Department of Applied Physics Hong Kong Polytechnic University(PolyU)KowloonHong KongChina Centre for Integrated Systems Engineering and Advanced Technologies(Integra) Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia(UKM)43600 BangiSelangorMalaysia Graduate School of Pure and Applied Sciences University of TsukubaTsukubaIbaraki 305-8573Japan Department of Electrical Engineering Faculty of EngineeringUniversity of MalayaJalan Universiti50603 Kuala LumpurSelangorMalaysia Nanomaterials Research Institute(NanoMaRi) Kanazawa UniversityKakumaKanazawa 920-1192Japan Department of Computer Engineering College of Computer and Information SciencesKing Saud University11543 RiyadhSaudi Arabia Department of Electrical and Computer Engineering University of CaliforniaDavisCA 95616USA Institute of Sustainable Energy Universiti Tenaga Nasional(@The National Energy University)Jalan IKRAM-UNITEN43000 KajangSelangorMalaysia

We report the design of a nanophotonic metaloxide front contact aimed at perovskite solar cells(PSCs)to enhance optoelectronic properties and device stability in the presence of ultraviolet(UV)***-quality Cr-doped ZnO film was prepared by industrially feasible magnetron sputter deposition for the electron transport layer of *** a means,the influence of the Cr content on the film and device was systematically ***-depth device optics and electrical effects were studied using advanced three-dimensional opto-electrical multiphysics rigorous simulations,optimizing the front contact for realizing high *** numerical simulation was validated by fabricating PSCs optimized to reach high performance,energy conversion efficiency(ECE)=17.3%,open-circuit voltage(V_(OC))=1.08 V,short-circuit current density(J_(SC))=21.1 mA cm^(-2),and fillfactor(FF)=76%.Finally,a realistic front contact of nanophotonic architecture was proposed while improving broadband light absorption of the solar spectrum and light harvesting,resulting in enhanced quantum efficiency(QE).The nanophotonic PSC enables J_(SC)improvement by~17%while reducing the reflection by 12%,resulting in an estimated conversion efficiency over 23%.It is further demonstrated how the PSCs’UV-stability can be improved without considerably sacrificing optoelectronic *** of nanophotonic designed ZnO:Cr front contact,PSCs device,and fabrication process are described.

关键词： ZnO:Cr front contact magnetron sputtering perovskite solar cells UV stability optics and electrical effects

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Automatic 2D Material Detection in Optical Images using Deep Learning Based computer Vision 4

Automatic 2D Material Detection in Optical Images using Deep...

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AI and Optical Data Sciences IV 2023

作者： Ramezani, Fereshteh Parvez, Sheikh Fix, J. Pierce Battaglin, Arthur Whyte, Seamus Borys, Nicholas J. Whitaker, Bradley Electrical and Computer Engineering Department Montana State University Bozeman United States Department of Physics Montana State University Bozeman United States Materials Science Program Montana State University Bozeman United States Optical Technology Center Montana State University Bozeman United States

ISBN: (纸本)9781510659810

computer vision algorithms can quickly analyze numerous images and identify useful information with high accuracy. Recently, computer vision has been used to identify 2D materials in microscope images. 2D materials have important fundamental properties allowing for their use in many potential applications, including many in quantum information science and engineering. In order to use these materials for research and product development, single-layer 2D crystallites must be prepared through an exfoliation procedure and then identified using reflected light optical microscopy. Performing these searches manually is a time-consuming and tedious task. Deploying deep learning-based computer vision algorithms for 2D material search can automate the flake detection task with minimal need for human intervention. In this work, we have implemented a new deep learning pipeline to classify crystallites of 2D materials based on coarse thickness classifications in reflected-light optical micrographs. We have used DetectorRS as the object detector and trained it on 177 images containing hexagonal boron nitride (hBN) flakes of varying thickness. The trained model achieved a high detection accuracy for the rare category of thin flakes ( © 2023 SPIE.

关键词： Object detection

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Integrated self-referencing single shot digital holographic microscope and optical tweezer

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Light(Advanced Manufacturing) 2022年第3期3卷 205-218页

作者： Subhash Utadiya Sachin Joshi Nimit Patel Chetna Patel Mugdha Joglekar Vani Cahhniwal Timothy O’Connor Bahram Javidi Arun Anand Optics Laboratory Applied Physics DepartmentFaculty of Technology and EngineeringThe Maharaja Sayajirao University of BarodaVadodara 390001India Department of Electrical and Computer Engineering University of ConnecticutStorrsCT06269-4157USA Institute of Interdisciplinary Studies The Maharaja Sayajirao University of BarodaVadodaraIndia

Digital holographic microscopy is a single-shot technique for quantitative phase imaging of samples,yielding thickness profiles of phase *** provides sample features based on their morphology,leading to their classification and ***,observing samples,especially cells,in fluids using holographic microscopes is difficult without immobilizing the *** tweezers can be used for sample immobilization in *** present manuscript provides an overview of our ongoing work on the development of a compact,low-cost microscopy system for digital holographic imaging of optically trapped *** of digital holographic microscopy system with tweezers is realized by using the optical pickup unit extracted from DVD burners to trap microsamples,which are then holographically imaged using a highly compact self-referencing interferometer along with a low-cost,in-house developed quadrant photodiode,providing morphological and spectral information of trapped *** developed integrated module was tested using polystyrene microspheres as well as human *** investigated system offers a multitude of sample features,including physical and mechanical parameters and corner frequency information of the *** features were used for sample *** proposed technique has vast potential in opening up new avenues for low-cost,digital holographic imaging and analysis of immobilized samples in fluids and their classification.

关键词： Digital holographic microscopy Optical tweezers Red blood cells Quantitative phase imaging

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Not so griddy: internal representations of RNNs path integrating more than one agent 24

Not so griddy: internal representations of RNNs path integra...

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Proceedings of the 38th International Conference on Neural Information Processing Systems

作者： William T. Redman Francisco Acosta Santiago Acosta-Mendoza Nina Miolane Intelligent Systems Center Johns Hopkins Applied Physics Laboratory Department of Physics University of California Santa Barbara Dynamical Neuroscience University of California Santa Barbara Department of Electrical & Computer Engineering University of California Santa Barbara

ISBN: (纸本)9798331314385

Success in collaborative and competitive environments, where agents must work with or against each other, requires individuals to encode the position and trajectory of themselves and others. Decades of neurophysiological experiments have shed light on how brain regions [e.g., medial entorhinal cortex (MEC), hippocampus] encode the self's position and trajectory. However, it has only recently been discovered that MEC and hippocampus are modulated by the positions and trajectories of others. To understand how encoding spatial information of multiple agents shapes neural representations, we train a recurrent neural network (RNN) model that captures properties of MEC to path integrate trajectories of two agents simultaneously navigating the same environment. We find significant differences between these RNNs and those trained to path integrate only a single agent. At the individual unit level, RNNs trained to path integrate more than one agent develop weaker grid responses, stronger border responses, and tuning for the relative position of the two agents. At the population level, they develop more distributed and robust representations, with changes in network dynamics and manifold topology. Our results provide testable predictions and open new directions with which to study the neural computations supporting spatial navigation.

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ISAR Imaging of Near-Shore Maritime Vessels using a Low-Cost X-band Radar

ISAR Imaging of Near-Shore Maritime Vessels using a Low-Cost...

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IEEE SENSORS

作者： Nicole Pham Dylan Wesen John Mower Matthew S. Reynolds Department of Electrical & Computer Engineering University of Washington Seattle WA USA Department of Mechanical Engineering University of Washington Seattle WA USA Applied Physics Laboratory University of Washington Seattle WA USA

ISBN: (数字)9798350363517

ISBN: (纸本)9798350363524

This study presents a demonstration of using a low-cost off-the-shelf X-band radar system for ISAR imaging of maritime vessels. The system consisted of the CN0566 kit from Analog Devices, a WR-102 horn antenna, and a computer. The radar receiver consisted of an Analog Devices CN0566 X-band dual 8 element linear array of 98 mm aperture, while the transmitter antenna was a 15 dB gain horn. The radar bandwidth was 500 MHz resulting in an ISAR image resolution of 0.3 m in range and 0.66 m in cross-range. Data was collected on two boats passing by the radar. Images were focused using simple track estimation, and the resulting images were reasonable representations of the vessel dimensions.

关键词： Solid modeling Adaptation models Horn antennas Imaging Boats Radar imaging Radar antennas Radar tracking Sensors Linear antenna arrays

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All electromagnetic scattering bodies are matrix-valued oscillators

All electromagnetic scattering bodies are matrix-valued osci...

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Frontiers in Optics, FiO 2022

作者： Zhang, Lang Monticone, Francesco Miller, Owen D. Department of Applied Physics Energy Sciences Institute Yale University New HavenCT06511 United States School of Electrical and Computer Engineering Cornell University IthacaNY14853 United States

We show that a special scattering matrix, the "T matrix," encodes causality and passivity in any electromagnetic scatterer. We use it to develop a general theory of the ultimate limits to near-field radiativ...

ISBN: (纸本)9781557528209

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