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arXiv 2025年

作者： Yu, Danying Song, Wange Wang, Luojia Srikanth, Rohith Sridhar, Sashank Kaushik Chen, Tao Huang, Chenxi Li, Guangzhen Qiao, Xin Wu, Xiaoxiong Dong, Zhaohui He, Yanyan Xiao, Meng Chen, Xianfeng Dutt, Avik Gadway, Bryce Yuan, Luqi State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and Astronomy Shanghai Jiao Tong University Shanghai200240 China National Laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and Manipulation Jiangsu Key Laboratory of Artificial Functional Materials College of Engineering and Applied Sciences Nanjing University Nanjing210093 China New Cornerstone Science Laboratory Department of Physics University of Hong Kong Hong Kong Department of Mechanical Engineering Institute for Physical Science and Technology University of Maryland College ParkMD20742 United States Department of Physics University of Illinois at Urbana-Champaign UrbanaIL61801-3080 United States Department of Physics The Pennsylvania State University University ParkPA16802 United States School of Physics Xi’an Jiao Tong University Xi’an710049 China College of Physics and Electronics Engineering Northwest Normal University Lanzhou730070 China Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education School of Physics and Technology Wuhan University Wuhan430072 China Collaborative Innovation Center of Light Manipulations and Applications Shandong Normal University Jinan250358 China at Maryland College ParkMD20742 United States

The concept of synthetic dimensions has emerged as a powerful framework in photonics and atomic physics, enabling the exploration of high-dimensional physics beyond conventional spatial constraints. Originally developed for quantum simulations in high dimensions, synthetic dimensions have since demonstrated advantages in designing novel Hamiltonians and manipulating quantum or optical states for exploring topological physics, and for applications in computing and information processing. Here we provide a comprehensive overview of progress in synthetic dimensions across photonic, atomic, and other physical platforms over the past decade. We showcase different approaches used to construct synthetic dimensions and highlight key physical phenomena enabled by the advantage of such a framework. By offering a unified perspective on developments in this field, we aim to provide insights into how synthetic dimensions can bridge fundamental physics and applied technologies, fostering interdisciplinary engagement in quantum simulation, atomic and photonic engineering, and information processing. © 2025, CC BY.

关键词： Atoms

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可重构三维热穹（英文）

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engineering 2025年第3期 236-244页

作者：周宇鸿杨福宝须留钧庄鹏飞王栋欧阳晓平李鹰黄吉平 State Key Laboratory of Surface Physics & Key Laboratory of Micro-and Nano-Photonic Structures (Ministry of Education) Department of Physics Fudan University Graduate School of China Academy of Engineering Physics International Joint Innovation Center The Electromagnetics Academy at Zhejiang University Zhejiang University State Key Laboratory of Extreme Photonics and Instrumentation & Key Laboratory of Advanced Micro-Nano Electronic Devices and Smart Systems and Applications of Zhejiang Province Zhejiang University School of Materials Science and Engineering Xiangtan University

Thermal metamaterial represents a groundbreaking approach to control heat conduction,and,as a crucial component,thermal invisibility is of utmost importance for heat *** the flourishing development of thermal invisibility schemes,they still face two limitations in practical ***,objects are typically completely enclosed in traditional cloaks,making them difficult to use and unsuitable for objects with heat ***,although some theoretical proposals have been put forth to change the thermal conductivity of materials to achieve dynamic invisibility,their designs are complex and rigid,making them unsuitable for large-scale use in real threedimensional(3D) ***,we propose a concept of a thermal dome to achieve 3D *** scheme includes an open functional area,greatly enhancing its usability and *** features a reconfigurable structure,constructed with simple isotropic natural materials,making it suitable for dynamic *** performance of our reconfigurable thermal dome has been confirmed through simulations and experiments,consistent with the *** introduction of this concept can greatly advance the development of thermal invisibility technology from theory to engineering and provide inspiration for other physical domains,such as direct current electric fields and magnetic fields.

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In-Situ Electrostatic Field Regulating the Recrystallization Behavior of P(Vdf-Trfe) Films with High Β-Phase Content and Enhanced Piezoelectric Properties

SSRN

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SSRN 2022年

作者： Lv, Fu Lin, Jiamin Zhou, Zheng Hong, Zijian Wu, Yongjun Ren, Zhaohui Zhang, Qilong Dong, Shurong Luo, Jikui Shi, Junhui Chen, Ruimin Liu, Bing Su, Yuanjie Huang, Yuhui School of Materials Science and Engineering State Key Laboratory of Silicon Materials Cyrus Tang Center for Sensor Materials and Applications Zhejiang University Zhejiang Hangzhou310027 China School of Materials Science and Engineering State Key Lab of Silicon Materials Zhejiang University Zhejiang Hangzhou310027 China College of Information Science and Electronic Engineering Key Lab of Advanced Micro Nano Electronic Devices & Smart Systems of Zhejiang Zhejiang University Zhejiang Hangzhou310027 China Zhejiang Lab Zhejiang Hangzhou311121 China College of Electronic Information and Engineering Hangzhou Dianzi University Zhejiang Hangzhou310018 China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Sichuan Chengdu610054 China

Fabrication of flexible piezoelectric polymers is essential for the development of wearable biosensors. Nevertheless, the piezoelectric coefficient of polymers is usually an order of magnitude lower than the inorganic piezoelectric materials, which limits the miniature of the devices. Herein, a simple and cost-effective technique is proposed by applying an electrostatic field to in-situ regulate the recrystallization behavior of the poly(vinylidene fluoride-trifluorethylene) (P(VDF-TrFE)) film during the thermal annealing and recrystallization stage. Significantly enhanced properties are obtained, including a large piezoelectric coefficient (d 33 ~30.7 pC/N) and a high voltage sensitivity of 167.12 mV/kPa. The outstanding performance is mainly attributed to the applied electrostatic field maintained during the film growth stage, which promotes the generation of nucleation sites for the polar β lamellae crystals. A wireless sensor system is further established with the obtained P(VDF-TrFE) film, demonstrating great potential applications in movement monitoring. The proposed facile approach could potentially be applied to the large-scale production of polymer films with excellent piezoelectric properties for flexible wireless biosensing device applications. © 2022, The Authors. All rights reserved.

关键词： Piezoelectricity

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An Efficient Neural Network Macro-model for Electromagnetic Radiation Spurious Emission from Voltage-Variable Capacitors

An Efficient Neural Network Macro-model for Electromagnetic ...

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IEEE International Symposium on Electromagnetic Compatibility - EMC Europe

作者： Sichen Yang Duo Zhang Chenghan Wu Qiting Lu Yudi Fan Er-Ping Li College of Information Science and Electronic Engineering Key Laboratory of Advanced Micro/Nano Electronic Devices & Smart Systems and Applications Hangzhou China

ISBN: (数字)9781728155791

ISBN: (纸本)9781728155807

Voltage-variable capacitor is an essential part of the matching element in RF circuits such as transmitting and receiving channel in the mobile devices. However, the nonlinearity of the voltage-variable capacitor produces unwanted harmonics with a large exciting signal, which generates the electromagnetic radiation spurious emission (RSE) problem. This paper presents an efficient nonlinear capacitance power series model method coupling with harmonics test systems to predict the nonlinear behavior. In addition, a simple neural network model is trained to reduce manual operation of optimizing the nonlinear parameters. As a consequence, the nonlinear parameters are obtained quickly, and provide the intuitive guideline in designing phase.

关键词： Radio frequency Voltage measurement Capacitors Electromagnetic radiation Harmonic analysis Electromagnetic compatibility Frequency measurement

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Localization of chiral edge states by the non-Hermitian skin effect

arXiv

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arXiv 2023年

作者： Liu, Gui-Geng Mandal, Subhaskar Zhou, Peiheng Xi, Xiang Banerjee, Rimi Hu, Yuan-Hang Wei, Minggui Wang, Maoren Wang, Qiang Gao, Zhen Chen, Hongsheng Yang, Yihao Chong, Yidong Zhang, Baile Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link Singapore637371 Singapore National Engineering Research Center of Electromagnetic Radiation Control Materials State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of China Chengdu610054 China Department of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen518055 China School of Physics Collaborative Innovation Center of Advanced Microstructures Nanjing University Jiangsu Nanjing210093 China Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical Instrumentation ZJU-Hangzhou Global Science and Technology Innovation Center College of Information Science and Electronic Engineering Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang ZJU-UIUC Institute Zhejiang University Hangzhou310027 China Centre for Disruptive Photonic Technologies The Photonics Institute Nanyang Technological University 50 Nanyang Avenue Singapore639798 Singapore

Quantum Hall systems host chiral edge states extending along the one-dimensional boundary of any two-dimensional sample. In solid state materials, the edge states serve as perfectly robust transport channels that produce a quantised Hall conductance;due to their chirality, and the topological protection by the Chern number of the bulk bandstructure, they cannot be spatially localized by defects or disorder. Here, we show experimentally that the chiral edge states of a lossy quantum Hall system can be localized. In a gyromagnetic photonic crystal exhibiting the quantum Hall topological phase, an appropriately structured loss configuration imparts the edge states’ complex energy spectrum with a feature known as point-gap winding. This intrinsically non-Hermitian topological invariant is distinct from the Chern number invariant of the bulk (which remains intact) and induces mode localization via the "non-Hermitian skin effect". The interplay of the two topological phenomena – the Chern number and point-gap winding – gives rise to a non-Hermitian generalisation of the paradigmatic Chern-type bulk-boundary correspondence principle. Compared to previous realisations of the non-Hermitian skin effect, the skin modes in this system have superior robustness against local defects and disorders. Copyright © 2023, The Authors. All rights reserved.

关键词： Topology

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A Study on Sleep Position Recognition of Body Pressure Image based on KPCA and SVM

A Study on Sleep Position Recognition of Body Pressure Image...

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2019 IEEE International Conference on Power, Intelligent Computing and systems, ICPICS 2019

作者： Liu, Zhong Wang, Xin'an Le, Yang Sun, Jone School of Electronics Engineering and Computer Science Peking University China Key Laboratory of Integrated Micro-System Science and Engineering Applications Peking University Shenzhen Graduate School Shenzhen China IFutureLab Inc. United States

ISBN: (纸本)9781728137209

Sleep is an important part of life, and sleep position recognition is an important indicator which reflects sleep quality, warns diseases and prevents pressure sores. Actually, sleep quality is usually related to the body pressure, which affects muscle comfort and blood circulation during sleep. However, in order to regulate the body pressure, one vital step is to recognize the sleep position. Body pressure is a common indicator of the recognition of sleep position. This investigation put forward a body pressure recognition method combining with kernel principal component analysis (KPCA) and support vector machine. The feature extraction based on KPCA can well solve the nonlinear separable problems as well as dimension reduction processing of PCA, and reduce the system's complexity. Compared with the image recognition method and computer vision recognition method, it realized a higher recognition accuracy at a lower cost. Ultimately, the recognition accuracy of six common sleep positions reached 96.5%. © 2019 IEEE.

关键词： Support vector machines

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A Method to Recognize Sleeping Position Using an CNN Model Based on Human Body Pressure Image

A Method to Recognize Sleeping Position Using an CNN Model B...

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2019 IEEE International Conference on Power, Intelligent Computing and systems, ICPICS 2019

作者： Liu, Zhong Wang, Xin'an Su, Mingliang Lu, Ken School of Electronics Engineering and Computer Science Peking University China Key Laboratory of Integrated Micro-System Science and Engineering Applications Peking University Shenzhen Graduate School Shenzhen China IFutureLab Inc. United States

ISBN: (纸本)9781728137209

Sleep is an important part of human life. Recognition of sleeping position is an important part of judging the quality of sleep, warning disease and prevention of pressure sores. At present, the body pressure is being used as a commonly method to recognize sleep gesture, and most of it is based on methods of extracting features, mainly based on local signs and global features. This paper proposes a deep learning method based on CNN deep learning method to deal with recognition of body pressure image. Compared with the previous methods, the method based on CNN neural network achieves higher accuracy of recognition at a lower cost and is suitable for complex application environments, which has good practical value. © 2019 IEEE.

关键词： Sleep research

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A Multi-feature Anomaly Detection Method Based on AETA ULF Electromagnetic Disturbance Signal

A Multi-feature Anomaly Detection Method Based on AETA ULF E...

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IEEE Information Technology, Networking, Electronic and Automation Control Conference

作者： Cong Liu Shanshan Yong Xin'an Wang Xing Zhang The Key Laboratory of Integrated Micro-Systems Peking University Shenzhen Graduate School Shenzhen China School of Electronics Engineering and Computer Science Peking University Beijing China

ISBN: (数字)9781728143903

ISBN: (纸本)9781728143910

There have been many studies in relationship between ultra-low frequency electromagnetic anomaly and earthquakes, while most of them judge anomaly using single feature. We propose a multi-feature anomaly detection method for AETA ULF electromagnetic disturbance signals based on Isolation Forest, with some feature extraction and selection method added. A statistical test method superposed epoch analysis (SEA) is used for its evaluation. The result shows that 6 of 12 selected stations show significant correlation between signal anomaly and earthquakes. A further comparison experiment shows that our method has better performance than traditional single-feature sliding IQR method, which indicates multi-feature might be a good choice in finding global anomaly points.

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Tellurium nanowire retinal nanoprosthesis improves vision in models of blindness

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science (New York, N.Y.) 2025年第6751期388卷 eadu2987页

作者： Shuiyuan Wang Chengyong Jiang Yiye Yu Zhenhan Zhang Ruge Quhe Ruyi Yang Yufei Tian Xindong Chen Wenqiang Fan Yinge Niu Biao Yan Chunhui Jiang Yang Wang Zhen Wang Chunsen Liu Weida Hu Jiayi Zhang Peng Zhou State Key Laboratory of Integrated Chips and Systems (SKLICS) College of Integrated Circuits and Micro-Nano Electronics School of Microelectronics State Key Laboratory of Brain Function and Disorders MOE Frontiers Center for Brain Science Institutes of Brain Science Department of Ophthalmology and Vision Science Eye and ENT Hospital Fudan University Shanghai China. Shaoxin Laboratory Shaoxing Zhejiang China. State Key Laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai China. School of Electrical and Electronic Engineering Nanyang Technological University Singapore Singapore. State Key Laboratory of Information Photonics and Optical Communications and School of Science Beijing University of Posts and Telecommunications Beijing China.

Present vision restoration technologies have substantial constraints that limit their application in the clinical setting. In this work, we fabricated a subretinal nanoprosthesis using tellurium nanowire networks (TeNWNs) that converts light of both the visible and near-infrared-II spectra into electrical signals. The broad-spectrum coverage is made possible by a combination of narrow bandgaps, strong absorption, and engineered asymmetries. Implanted into blind mice, the TeNWNs restored pupillary reflexes and enabled visually cued learning under visible and near-infrared 1550-nanometer light. In nonhuman primates, TeNWNs elicited robust retina-derived neural responses, confirming biocompatibility and feasibility. By restoring lost photosensitivity and extending vision to near-infrared, this nanoprosthesis offers a promising approach for restoring vision.

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Breakdown of effective-medium theory by a photonic spin Hall effect

arXiv

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arXiv 2023年

作者： Yuan, Shuaijie Zhou, Xinxing Chen, Yu Zhong, Yuhan Sheng, Lijuan Hu, Hao Chen, Hongsheng Kaminer, Ido Lin, Xiao Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Synergetic Innovation Center for Quantum Effects and Applications School of Physics and Electronics Hunan Normal University Changsha410081 China International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province Institute of Microscale Optoelectronics Shenzhen University Shenzhen518060 China Interdisciplinary Center for Quantum Information State Key Laboratory of Extreme Photonics Instrumentation ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang University Hangzhou310027 China International Joint Innovation Center The Electromagnetics Academy Zhejiang University Zhejiang University Haining314400 China School of Electrical and Electronic Engineering Nanyang Technological University 50 Nanyang Avenue Singapore639798 Singapore Key Laboratory of Radar Imaging and Microwave Photonics Ministry of Education College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing211106 China Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang Jinhua Institute of Zhejiang University Zhejiang University Jinhua321099 China Shaoxing Institute of Zhejiang University Zhejiang University Shaoxing312000 China Department of Electrical Engineering Technion-Israel Institute of Technology Haifa32000 Israel

Effective-medium theory pertains to the theoretical modelling of homogenization, which aims to replace an inhomogeneous structure of subwavelength-scale constituents with a homogeneous effective medium. The effective-medium theory is fundamental to various realms, including electromagnetics and material science, since it can largely decrease the complexity in the exploration of light-matter interactions by providing simple acceptable approximation. Generally, the effective-medium theory is thought to be applicable to any all-dielectric system with deep-subwavelength constituents, under the condition that the effective medium does not have a critical angle, at which the total internal reflection occurs. Here we reveal a fundamental breakdown of the effective-medium theory that can be applied in very general conditions: showing it for deep-subwavelength all-dielectric multilayers even without critical angle. Our finding relies on an exotic photonic spin Hall effect, which is shown to be ultra-sensitive to the stacking order of deep-subwavelength dielectric layers, since the spin-orbit interaction of light is dependent on slight phase accumulations during the wave propagation. Our results indicate that the photonic spin Hall effect could provide a promising and powerful tool for measuring structural defects for all-dielectric systems even in the extreme nanometer scale. Copyright © 2023, The Authors. All rights reserved.

关键词： Spin Hall effect

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