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2023 IEEE International Magnetic Conference - Short Papers, INTERMAG Short Papers 2023

作者： Shuai, Jintao Lopez-Diaz, Luis Cunningham, John E. Moore, Thomas A. University of Leeds School of Physics and Astronomy Leeds United Kingdom Universidad de Salamanca Department of Applied Physics Salamanca Spain University of Leeds School of Electronic and Electrical Engineering Leeds United Kingdom

ISBN: (纸本)9798350338362

Magnetic skyrmions in thin films with perpendicular magnetic anisotropy are promising candidates for magnetic memory and logic devices, making the development of ways to transport skyrmions efficiently and precisely of significant interest. Here, we investigate the transport of skyrmions by surface acoustic waves (SAWs) via several modalities using micromagnetic simulations. We demonstrate skyrmion pinning sites created at the anti-nodes of standing SAWs and skyrmion Hall-like motion without pinning driven by travelling SAWs. We also show how orthogonal SAWs formed by combining a longitudinal travelling SAW and a transverse standing SAW can be used for the precise 2D positioning of skyrmions. Our results also suggest SAWs offer a viable approach for the precise transport of multiple skyrmions along a multichannel racetrack. © 2023 IEEE.

关键词： Logic devices

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Potential of ultra-wideband gap semiconductors for sub-THz and THz applications 16

Potential of ultra-wideband gap semiconductors for sub-THz a...

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Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XVI 2023

作者： Shur, Michael Electrical Computer and Systems Engineering and Physics Applied Physics and Astronomy Rensselaer Polytechnic Institute TroyNY12110 United States Electronics of the Future Inc. ViennaVA22181 United States

ISBN: (纸本)9781510659452

Applications of terahertz (THz) and sub-THz technology require portable, inexpensive, efficient, and reliable THz electronics. This stimulated the search for novel semiconductor materials for THz applications. This paper evaluates the potential of ultra-wide bandgap semiconductors (UWBGS) for THz and sub-THz applications. The wide bandgap is the consequence of strong bonds between the nearest neighbors in UWBGS, such as diamond, boron nitride, and aluminum nitride. This is the consequence of small atomic radii of carbon and nitrogen forming intimate contacts with their nearest neighbors. The resulting high energies of optical phonons in these materials lead to superior transport properties, including high breakdown voltages and long mean free paths of electrons in the conduction band and holes in the valence band. These factors make ultra-wideband semiconductors prime candidates for high-power and high-frequency applications. The analysis of the cutoff frequencies and quality factor of plasma oscillations show that diamond has a high potential as an active material for Terahertz Field Effect Transistors (TeraFETs) generating THz and sub-THz radiation, including radiation in the 300 GHz range, which is of special interest for 6G communications. Boron nitride should enable high cutoff frequencies of operation in collision-dominated regimes. © 2023 SPIE.

关键词： III-V semiconductors

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Multiclass Signal Quality Assessment of Electrocardiogram using Entropy-based Features and Machine Learning Technique

Multiclass Signal Quality Assessment of Electrocardiogram us...

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2022 IEEE Silchar Subsection Conference, SILCON 2022

作者： Sardar, Priya Gupta, Rajarshi Mukhopadhyay, Sumitra University of Calcutta Electrical Engineering Applied Physics Kolkata India University of Calcutta Radio Physics and Electronics Dept. Kolkata India

ISBN: (纸本)9781665471008

Electrocardiology (ECG) is useful for deriving a multitude of cardiac functions, and widely used for ambulatory health monitoring. The main hindrance for automatic measurement utilizing ECG is signal quality which gets affected with various artifacts like patient motion, poor skin-electrode contact. While various of ECG signal quality assessment (SQA) techniques are available, most of the works use computationally intensive and memory demanding techniques like wavelet, autoencoders, mode decomposition techniques etc. This paper exhaustively uses various entropy features, which are information rich, computationally lightweight and promising for the application. Secondly, evidence of multiclass ECG SQA is occasional. This paper describes the use of 20 entropy features for 3-class ECG SQA. Total 400 records from Computing in Cardiology (CinC) 2011 challenge, each of 6 leads and of 10 s duration per lead was evaluated, with a blind test accuracy of 75.43% for 3 class and 97% for 2-class SQA. It was found that the entropy features outperform the wavelet and AE features, and random forest provides superior performance over support vector machine and k-NN. The present research provides improved results over few published works on ECG SQA using CinC2011 dataset. © 2022 IEEE.

关键词： Entropy

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Anti-Interference Low-Power Double-Edge Triggered Flip-Flop Based on C-Elements

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Tsinghua Science and Technology 2022年第1期27卷 1-12页

作者： Zhengfeng Huang Xiao Yang Tai Song Haochen Qi Yiming Ouyang Tianming Ni Qi Xu School of Electronic Science and Applied Physics Hefei University of TechnologyHefei 230601China School of Computer and Information Hefei University of TechnologyHefei 230601China School of Electrical Engineering Anhui Polytechnic UniversityWuhu 241000China

When the input signal has been interfered and glitches occur,the power consumption of Double-Edge Triggered Flip-Flops(DETFFs)will significantly *** effectively reduce the power consumption,this paper presents an anti-interference low-power DETFF based on *** improved C-element is used in this DETFF,which effectively blocks the glitches in the input signal,prevents redundant transitions inside the DETFF,and reduces the charge and discharge frequencies of the *** C-element has also added pull-up and pull-down paths,reducing its *** with other existing DETFFs,the DETFF proposed in this paper only flips once on the clock edge,which greatly reduces the redundant transitions caused by glitches and effectively reduces power *** paper uses HSPICE to simulate the proposed DETFF and other 10 *** findings show that compared with the other 10 types of DETFFs,the proposed DETFF has achieved large performance indexes in the total power consumption,total power consumption with glitches,delays,and power delay product.A detailed analysis of variance indicates that the proposed DETFF features less sensitivity to process,voltage,temperature,and Negative Bias Temperature Instability(NBTI)-induced aging variations.

关键词： Double-Edge Triggered Flip-Flop(DETFF) glitch low-power C-element

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A Simple Fiber Magnetic Field Sensor Based on Peanut Shaped MZI in Fiber Ring Laser 8

A Simple Fiber Magnetic Field Sensor Based on Peanut Shaped ...

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8th Optoelectronics Global Conference, OGC 2023

作者： Lin, Weihao Liu, Yuhui Zhang, Xuming Shum, Perry Ping Southern University of Science and Technology Department of Electrical and Electronic Engineering Shenzhen China Hong Kong Polytechnic University Department of Applied Physics Hong Kong Hong Kong

A peanut couple shaped Mach-Zehnder interferometer (MZI) in fiber ring laser (FRL) is proposed in this paper for high sensitivity magnetic field sensing. The designed optical fiber sensor is placed in the magnetic flu... 详细信息

ISBN: (纸本)9798350325324

关键词： Magnetic fields

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Ultrafast ranging using a dispersion-controlled dual-swept laser

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Photonics Research 2025年第5期13卷 1182-1190页

作者： WEI DU LEI CHEN YUJIA LI JINDONG WANG YULONG CAO LIGANG HUANG LEILEI SHI LEI GAO LEI WEI TAO ZHU Laboratory of Optoelectronic Technology & System (Ministry of Education) Chongqing University National Key Laboratory of Advanced Laser and High Power Microwave Institute of Applied Electronics China Academy of Engineering Physics School of Electrical and Electronic Engineering Nanyang Technological University

Ranging is indispensable in a variety of fields,encompassing basic science,manufacturing,production,and daily *** traditional methods based on the dispersive interferometry (DPI) in the frequency domain provide high precision,their measurement speed is slow,preventing the capture and measurement of dynamic ***,we propose a fast and precise ranging method based on the dispersion-controlled dual-swept laser(DCDSL),which allows the dynamical displacement measurement of the target under *** to the slight frequency sweeping speed difference between the signal and reference lights,there is a zero-frequency point of the oscillation (ZPO) generated in the interference signal,whose position in the time domain is linearly related to the relative delay between the signal and reference *** phase demodulation of the interference signal from the DCDSL and the fitting algorithm,the time-domain position of ZPO is accurately found,which precisely maps to the displacement of the target in real time without direction *** fast frequency sweeping rate ensures fast ranging with the MHz order refresh *** have experimentally demonstrated its capabilities for precise measurement of static distances and the capture of dynamic displacement processes through simulations and experiments,with the measurement range encompassing the entire interference period(56 mm).Compared to a calibrated motorized displacement platform,the residual error for full-range distance measurements is within 10μm,and the error in average speed during dynamic processes is 0.46%.Additionally,the system exhibits excellent stability,achieving a minimum Allan deviation of 4.25 nm over an average duration of approximately 4 *** method ensures high precision while maintaining a simple system,thereby advancing the practical implementation of ultrafast length metrology.

关键词： Absolute distance measurement Frequency combs Laser interferometry Neural networks Phase shift Ultrafast lasers

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Human Error Verification during ELF stimuli: Retinal Receptivity of ELF-Inducing Phosphenes

Human Error Verification during ELF stimuli: Retinal Recepti...

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2023 IEEE International Magnetic Conference - Short Papers, INTERMAG Short Papers 2023

作者： Nakagawa, Hidenori Ueno, Shoogo Tokyo Denki University Department of Electrical and Electronic Engineering Tokyo120-8551 Japan Kyushu University Department of Applied Quantum Physics Fukuoka812-8581 Japan

ISBN: (纸本)9798350338362

Needless to say, considerations for details in the retinal receptivity of the extremely low frequency (ELF)-inducing blindsight-like phosphenes are of great importance. In this paper, a further detailed validation of human reliabilities during the ELF stimuli was carried out. In the results of our analysis using signal detection theory, we found that the supraliminal effect had a certain amount of persistence for the flicker in the central part of the visual fields. Our results definitely revealed precious findings about an actual control of retinal activities with blindsight-like phosphenes induced by ELF stimuli, which may be able to provide preventive solutions for serious artificial mistakes and/or human errors. © 2023 IEEE.

关键词： Ophthalmology

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electrically tunable planar liquid-crystal singlets for simultaneous spectrometry and imaging

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Light(Science & Applications) 2024年第11期13卷 2589-2598页

作者： Zhou Zhou Yiheng Zhang Yingxin Xie Tian Huang Zile Li Peng Chen Yan-qing Lu Shaohua Yu Shuang Zhang Guoxing Zheng Electronic Information School and School of MicroelectronicsWuhan UniversityWuhan 430072China NUS Graduate School National University of SingaporeSingapore 119077Singapore Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore National Laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and Manipulationand College of Engineering and Applied SciencesNanjing UniversityNanjing 210093China Peng Cheng Laboratory Shenzhen 518055China New Cornerstone Science Laboratory Department of PhysicsUniversity of Hong KongHong KongChina Department of Electrical and Electronic Engineering University of Hong KongHong KongChina Wuhan Institute of Quantum Technology Wuhan 430206China

Conventional hyperspectral cameras cascade lenses and spectrometers to acquire the spectral datacube,which forms the fundamental framework for hyperspectral ***,this cascading framework involves tradeoffs among spectral and imaging performances when the system is driven toward ***,we propose a spectral singlet lens that unifies optical imaging and computational spectrometry functions,enabling the creation of minimalist,miniaturized and high-performance hyperspectral *** a paradigm,we capitalize on planar liquid crystal optics to implement the proposed framework,with each liquid-crystal unit cell acting as both phase modulator and electrically tunable spectral *** with various targets show that the resulting millimeter-scale hyperspectral camera exhibits both high spectral fidelity(>95%)and high spatial resolutions(~1.7 times the diffraction limit).The proposed“two-in-one”framework can resolve the conflicts between spectral and imaging resolutions,which paves a practical pathway for advancing hyperspectral imaging systems toward miniaturization and portable applications.

关键词： crystal planar singlet

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Fiber Ring Laser Sensor for Temperature Measurment Based on Isopropanol Filled SHF in Saganc Loop 8

Fiber Ring Laser Sensor for Temperature Measurment Based on ...

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8th Optoelectronics Global Conference, OGC 2023

作者： Liu, Yuhui Lin, Weihao Shum, Perry Ping Zhang, Xuming Southern University of Science and Technology Department of Electrical and Electronic Engineering Shenzhen China Hong Kong Polytechnic University Department of Applied Physics Hong Kong Hong Kong

ISBN: (纸本)9798350325324

In this paper, we proposed a high sensitivity temperature sensor based on isopropanol filled side hole fiber (SHF) in Sagnac loop inside fiber laser. Different from ordinary optical fiber sensors, Sagnac loop is beneficial to long-distance measurement, and the temperature monitoring system based on laser structure has high signal to noise ratio (-30 dB) and narrow linewidth (-0.2 nm). The 10 cm and 15 cm Sagnac rings are compared, and the temperature sensitivity of 0.376 nm/ and 0.366 nm/ are obtained respectively. It gives great potential for long-distance practical use in many scenarios. © 2023 IEEE.

关键词： Temperature sensors

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physics-guided hierarchical Neural Networks for Maxwell's equations in metamaterials

Physics-guided hierarchical Neural Networks for Maxwell's eq...

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CLEO: Fundamental Science, CLEO:FS 2024 - Part of Conference on Lasers and Electro-Optics, CLEO 2024

作者： Lynch, Sean LaMountain, Jacob Fan, Bo Bu, Jie Raju, Amogh Wasserman, Daniel Karpatne, Anuj Podolskiy, Viktor Department of Physics and Applied Physics University of Massachusetts LowellMA01854 United States Department of Computer Science Virginia Tech U VA United States Department of Electrical and Computer Engineering University of Texas AustinTX78758 United States

We develop a hierarchical approach to building a physics-guided neural network (PGNN) for scalable solutions of Maxwell equations with high spatial resolution and illustrate the developed formalism on a metamaterial p... 详细信息

ISBN: (纸本)9781957171395

关键词： Maxwell equations

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