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CLEO: Science and Innovations in CLEO 2024, CLEO: S and I 2024 - Part of Conference on Lasers and Electro-Optics

作者： Dacha, Sai Kanth Essiambre, René-Jean Ashikhmin, Alexei Blanco-Redondo, Andrea Zhang, Yuanhang Guo, Cheng Kschischang, Frank R. Banaszek, Konrad Ryf, Roland Weiner, Matthew Fontaine, Nicolas Murphy, Thomas E. Burrows, Ellsworth Nokia Bell Labs New ProvidenceNJ07974 United States Institute for Research in Electronics & Applied Physics University of Maryland College ParkMD20742 United States Department of Applied Physics and Applied Mathematics Columbia University New YorkNY10027 United States Department of Electrical and Computer Engineering University of Toronto TorontoONM5S 3G4 Canada Centre for Quantum Optical Technologies University of Warsaw Warszawa02-097 Poland

We demonstrate a record 14 bits-per-incident-photon Photon Information Efficiency (PIE) detection using a new transmitter design that produces an average extinction ratio of 89 dB and operates at four times higher rat... 详细信息

关键词： Optical fiber communication

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Cascaded multiparameter quantum metrology

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Physical Review A 2025年第1期111卷 012618-012618页

作者： Gregory Krueper Lior Cohen Juliet T. Gopinath Department of Physics University of Colorado Boulder Boulder Colorado 80309 USA Department of Electrical Computer and Energy Engineering University of Colorado Boulder Boulder Colorado 80309 USA Materials Science and Engineering Program University of Colorado Boulder Boulder Colorado 80309 USA

We present an innovative, platform-independent concept for multiparameter sensing where the measurable parameters are in series, or cascaded, enabling measurements as a function of position. With temporally resolved detection, we show that squeezing can give a quantum enhancement in sensitivity over that of classical states by a factor of e2r, where r≈1 is the squeezing parameter. As an example, we have modeled an interferometer that senses multiple phase shifts along the same path, demonstrating a maximal quantum advantage by combining a coherent state with squeezed vacuum. Further classical modeling with up to 100 phases shows linear scaling potential for adding nodes to the sensor. The approach can be applied to remote sensing, geophysical surveying, and infrastructure monitoring.

关键词： Interferometers

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electrically Tunable Terahertz Resonance in Antiferromagnetic NiO/Pt Heterostructures

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Physical Review applied 2023年第1期20卷 014023-014023页

作者： Dongsheng Yang Wen Wen Chang Xu Kyusup Lee Ting Yu Hyunsoo Yang Department of Electrical and Computer Engineering National University of Singapore Singapore 117576 Singapore Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore

Antiferromagnets that facilitate terahertz (THz) spin resonances have the potential to revolutionize high-speed electronics at the nanoscale. The electrical control of THz spin resonances is the key to such THz devices; however, experimental demonstration has remained elusive. In this work, we demonstrate electrically tunable THz spin resonance in an antiferromagnetic NiO/Pt heterostructure by employing both low-wavenumber Raman and continuous-wave THz spectroscopy techniques. A redshift of over 100 GHz in the NiO spin resonance frequency of around 1 THz is observed by applying charge currents along the adjacent Pt layer. A control experiment with NiO/Cu and temperature-dependent measurement confirm that the dominant tuning mechanism is Joule heating. Finally, a prototype device is designed to achieve an electrical control of THz transmission at dual channels of 0.96 and 1 THz, leading to a Q factor of 56. This work opens up the possibility for the implementation of tunable THz devices utilizing antiferromagnetic spin resonance.

关键词： Spin optoelectronics Spintronics Antiferromagnets Magnetic multilayers Optical sources & detectors Transition metal oxides Terahertz sources Terahertz spectroscopy

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14 Bits per Photon Detection in the Photon Starved Regime for Deep-Space Optical Communication

14 Bits per Photon Detection in the Photon Starved Regime fo...

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2024 Conference on Lasers and Electro-Optics, CLEO 2024

ISBN: (纸本)9781957171395

关键词： Optical fibers

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physics-Informed Machine Learning for Electricity Markets: A NYISO Case Study

IEEE Transactions on Energy Markets, Policy and Regulation

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IEEE Transactions on Energy Markets, Policy and Regulation 2024年第1期2卷 40-51页

作者： Ferrando, Robert Pagnier, Laurent Mieth, Robert Liang, Zhirui Dvorkin, Yury Bienstock, Daniel Chertkov, Michael University of Arizona Program in Applied Mathematics and Department of Mathematics TucsonAZ85721 United States Department of Industrial and Systems Engineering at Rutgers University PiscatawayNJ08854 United States Johns Hopkins University Department of Electrical and Computer Engineering BaltimoreMD21218-2625 United States Elec. and Comp. Eng. and Ralph o'Connor Sustainable Energy Institute Department of Civil and Systems Engineering Johns Hopkins University BaltimoreMD21218-2625 United States Columbia University IEOR New YorkNY10027 United States

This article addresses the challenge of efficiently recovering exact solutions to the optimal power flow problem in real-time electricity markets. The proposed solution, named physics-Informed Market-Aware Active Set learning OPF (PIMA-AS-OPF), leverages physical constraints and market properties to ensure physical and economic feasibility of market-clearing outcomes. Specifically, PIMA-AS-OPF employs the active set learning technique and expands its capabilities to account for curtailment in load or renewable power generation, which is a common challenge in real-world power systems. The core of PIMA-AS-OPF is a fully-connected neural network that takes the net load and the system topology as input. The outputs of this neural network include active constraints such as saturated generators and transmission lines, as well as non-zero load shedding and wind curtailments. These outputs allow for reducing the original market-clearing optimization to a system of linear equations, which can be solved efficiently and yield both the dispatch decisions and the locational marginal prices (LMPs). The dispatch decisions and LMPs are then tested for their feasibility with respect to the requirements for efficient market-clearing results. The accuracy and scalability of the proposed method is tested on a realistic 1814-bus NYISO system with current and future renewable energy penetration levels. © 2023 IEEE.

关键词： Costs

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Image Filtering Techniques for Beam Prediction in a Real-world 6G UAV Scenario 6

Image Filtering Techniques for Beam Prediction in a Real-wor...

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6th World Symposium on Communication engineering, WSCE 2023

作者： Rekkas, Vasileios P. Sotiroudis, Sotirios P. Sarigiannids, Panagiotis Psannis, Konstantinos E. Karagiannidis, George K. Goudos, Sotirios K. ELEDIA@AUTH School of Physics Aristotle University of Thessaloniki Thessaloniki54124 Greece University of Western Macedonia Department of Informatics and Telecommunications Engineering Kozani Greece University of Macedonia Department of Applied Informatics Thessaloniki54124 Greece School of Electrical and Computer Engineering Aristotle University of Thessaloniki Thessaloniki54124 Greece

ISBN: (纸本)9798350339505

Millimeter-wave (mm-wave) and terahertz (THz) communication systems can satisfy the high data rate requirements in 5G, 6G, and beyond networks, but still rely on the use of extensive antenna arrays to guarantee sufficient received signal strength. Many antennas incur high beam training overhead;thus, the narrow beams require adjustment to support highly mobile applications. Deep learning (DL) vision-aided solutions can potentially forecast the optimal beams, leveraging raw RGB images captured at the base station. Image filtering techniques have been widely used in computer vision (CV) to modify and enhance the quality of an image, based on specific rules. This work applies different filters to RGB images for accurate mm-wave/THz beam prediction and feature extraction based on pre-trained convolutional neural networks (CNNs). The assessment of the developed framework is conducted on an actual dataset captured by an unmanned aerial vehicle (UAV) operating in the millimeter-wave (mm-wave) frequency range. The dataset comprises RGB images taken at the base station. Ensemble filtering techniques are also studied, enhancing the beam prediction accuracy of two state-of-the-art (SOTA) DL models. © 2023 IEEE.

关键词： Millimeter waves

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Detection of Magnetite Rust Using Circular Microstrip Patch Antenna-based Chipless RFID Sensor

Detection of Magnetite Rust Using Circular Microstrip Patch ...

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2023 International electrical engineering Congress, iEECON 2023

作者： Nongpromma, Sirisak Janin, Suwan Kaemarungsi, Kamol Boonpoonga, Akkarat Chudpooti, Nonchanutt Bannawat, Lakkhana King Mongkut's University of Technology North Bangkok Faculty of Engineering Department of Electrical and Computer Engineering Bangkok Thailand Rajamangala University of Technology Lanna Lampang Faculty of Engineering Department of Engineering and Technology Lampang52000 Thailand National Electronics and Computer Technology Center National Science and Technology Development Agency Pathumthani Thailand King Mongkut's University of Technology North Bangkok Faculty of Engineering Department of Electrical and Computer Engineering Bangkok Thailand King Mongkut's University of Technology North Bangkok Faculty of Applied Science Department of Industrial Physics and Medical Instrumentation Bangkok Thailand Rajamangala University of Technology Rattanakosin Faculty of Engineering Department of Computer Engineering Nakhon Pathom Thailand

ISBN: (纸本)9798350332360

In this paper, detection of the magnetite rust is presented by using a chipless RFID sensor based on a circular microstrip patch antenna (CMPA). The sensor is designed at the resonant frequency of 4.89 GHz by using a single-layer PCB with its dielectric constant of 4.3. Simulations were conducted to verify that the designed sensor can detect the magnetite rust through shifted resonant frequency. In simulations, the sensor was mounted on the iron with its magnetite rust. The width and depth of iron rust were varied in order to investigate the effect of iron rust on the resonant frequency. Simulation results have been shown that the proposed chipless RFID sensor and RCS' can be utilized to detect the effect of the iron rust. © 2023 IEEE.

关键词： Microstrip antennas

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Cooling Yb-Doped Silica Fibers and Fiber Lasers with Anti-Stokes Pumping 5

Cooling Yb-Doped Silica Fibers and Fiber Lasers with Anti-St...

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Photonic Heat Engines: Science and Applications V 2023

作者： Frey, Benjamin N. Balliu, Enkeleda Vigneron, Pierre-Baptiste Knall, Jenny Hawkins, Thomas W. Meehan, Bailey Cahoon, Mary Ann Ballato, John Engholm, Magnus Dragic, Peter D. Yu, Nanjie Boilard, Tommy Bernier, Martin Digonnet, Michel J.F. Applied Physics Department Stanford University CA United States Department of Engineering Mathematics and Science Education Mid Sweden University Sundsvall Sweden Department of Materials Science and Engineering Clemson University South Carolina United States Department of Electrical Computer Engineering U. of Illinois at Urbana-Champaign IL United States Université Laval Québec Canada

ISBN: (纸本)9781510659797

Optical cooling in Yb-doped silica fibers using anti-Stokes fluorescence has become a subject of great interest in the fiber laser community. This paper provides an update on the development of silica fibers designed specifically to enhance their cooling properties. This growing list includes a new, nearly single-mode fiber with a borophosphosilicate core that produced –65 mK of cooling with only 260 mW of 1040-nm pump power. The silica compositions that have now been successfully cooled at atmospheric pressure by anti-Stokes fluorescence by our team include aluminosilicate, aluminofluorosilicate, borophosphosilicate, and aluminosilicate doped with one of three different alkali-earth nanoparticles (Ba, Sr, and Ca). By fitting the measured temperature dependence of the cooled fiber on pump power, two key parameters that control the degree of cooling are inferred, namely the critical quenching concentration and the absorptive loss due to impurities. The inferred values compiled for the fibers that cooled indicate that the extracted heat is highest when the Yb concentration is 2 wt.% or more (to maximize heat extraction), the Al concentration is ~0.8 wt.% or greater (to reduce quenching), and the absorptive loss is below approximately 15 dB/km, and ideally below 5 dB/km (to minimize heating due to pump absorption). Only two of the reported fibers, an LaF3-doped and an LuF3-doped nanoparticle fiber, did not cool, because their Yb and Al concentrations were not sufficiently high. This analysis shows that through careful composition control (especially the Al and Yb concentrations) and minimization of the OH contamination, a new generation of Yb-doped silica fibers is emerging with higher Yb concentrations, greater resistance to quenching, and lower residual loss than commercial Yb-doped fibers. They can be expected to have a significant impact not only on optically cooled devices but also on a much broader range of fiber lasers and amplifiers. © 2023 SPIE.

关键词： Nanoparticles

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Strain-balanced AlScN/GaN HEMTs with fT/fMAX of 173/321 GHz

Strain-balanced AlScN/GaN HEMTs with fT/fMAX of 173/321 GHz

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2024 IEEE International Electron Devices Meeting, IEDM 2024

作者： Nguyen, T.S. Nomoto, K. Zhao, W. Savant, C. Xing, H.G. Jena, D. Department of Materials Science and Engineering Cornell University IthacaNY14853 United States School of Electrical and Computer Engineering Cornell University IthacaNY14853 United States School of Applied and Engineering Physics Cornell University IthacaNY14853 United States Kavli Institute Cornell for Nanoscale Science Cornell University IthacaNY14853 United States

ISBN: (纸本)9798350365429

We report the effect of scaling the gate length from 0.8 µm to 40 nm on the performance of novel strain-balanced AlScN/GaN high electron mobility transistors (HEMTs) on SiC substrates. A new strain-balanced heterostructure is introduced where the tensile strain of the AlN interlayer is balanced by the compressive strain in the AlScN barrier layer. MBE regrown source/drain ohmics with ultralow contact resistance of 0.09 Ω·mm allow a low HEMT on resistance of 0.83 Ω·mm. The shortest gate length AlScN/GaN HEMTs exhibit maximum drain currents of 2.8 A/mm, peak transconductance of 0.55 S/mm, and speed characterized by fT/fMAX of 173/321 GHz. The highest fMAX obtained here is ∼2X higher than previous AlScN HEMTs. © 2024 IEEE.

关键词： Gallium nitride

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Current-Induced Helicity Switching of Frustrated Skyrmions on a Square-Grid Obstacle Pattern

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Journal of the Magnetics Society of Japan 2023年第1期47卷 20-27页

作者： Zhang, X. Xia, J. Tretiakov, O.A. Diep, H.T. Zhao, G. Yang, J. Zhou, Y. Ezawa, M. Liu, X. Department of Electrical and Computer Engineering Shinshu University 4-17-1 Wakasato Nagano380-8553 Japan School of Physics The University of New South Wales Sydney2052 Australia Laboratoire de Physique Théorique et Modélisation CY Cergy Paris Université Cergy-Pontoise Cedex95302 France College of Physics and Electronic Engineering Sichuan Normal University Chengdu610068 China State Key Laboratory for Mesoscopic Physics School of Physics Peking University Beijing100871 China School of Science and Engineering The Chinese University of Hong Kong Guangdong Shenzhen518172 China Department of Applied Physics The University of Tokyo 7-3-1 Hongo Tokyo113-8656 Japan

Topological spin textures on artificial pinning landscape may show unique static and dynamic properties. Here, we computationally show that the helicity of frustrated skyrmions on an artificial square-grid obstacle pattern can be switched by a spin current pulse. The obstacle pattern is formed by defect lines with enhanced perpendicular magnetic anisotropy, which could protect the skyrmion from being annihilated at the sample edge. It is found that the skyrmion driven by a moderate current shows a circular motion guided by the boundary of the obstacle pattern, while it shows an almost straight motion toward the sample edge in the absence of the obstacle pattern. By applying a short pulse current to drive the skyrmion in a sample with the obstacle pattern, we find that the helicity of the skyrmion could be switched between Bloch-type configurations favored by the dipole-dipole interaction. Besides, we demonstrate the pos-sibility of switching the helicity of an array of skyrmions on the square-grid obstacle pattern using the same method. Our results could be useful for the helicity control of topological spin textures, and may provide guidelines for building future helicity-based spintronic functions. © 2023 by the Magnetics Society of Japan.

关键词： Textures

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