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Boundary-Induced Topological Chiral Extended States in Weyl Metamaterial Waveguides

Physical Review Letters 2025年第19期134卷 196601-196601页

作者： Ning Han Fujia Chen Mingzhu Li Rui Zhao Wenhao Li Qiaolu Chen Li Zhang Yuang Pan Yuze Hu Mingyu Tong Lu Qi Jingwen Ma Zhi-Ming Yu Hongsheng Chen Yihao Yang State Key Laboratory of Extreme Photonics and Instrumentation ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang University Hangzhou 310027 China International Joint Innovation Center The Electromagnetics Academy at Zhejiang University Zhejiang University Haining 314400 China Key Laboratory of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang Jinhua Institute of Zhejiang University Zhejiang University Jinhua 321099 China College of Optical and Electronic Technology China Jiliang University Hangzhou 310018 China School of Information and Electrical Engineering Hangzhou City University Hangzhou 310015 China School of Physical Science and Technology Yangzhou University Yangzhou 225002 China Faculties of Science and Engineering The University of Hong Kong Hong Kong China Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE) School of Physics Beijing Institute of Technology Beijing 100081 China Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems School of Physics Beijing Institute of Technology Beijing 100081 China

In topological physics, it is commonly understood that the existence of the boundary states of a topological system is inherently dictated by its bulk. A classic example is that the surface Fermi-arc states of a Weyl system are determined by the chiral charges of Weyl points within the bulk. Contrasting with this established perspective, here, we theoretically and experimentally discover a family of topological chiral bulk states extending over photonic Weyl metamaterial waveguides, solely induced by the waveguide boundaries, independently of the waveguide width. Notably, these chiral bulk states showcase discrete momenta and function as tunnels that connect Fermi-arc surface states living in different two-dimensional spaces via a third dimension. Our work offers an alternative mechanism for robust chiral bulk transport of waves and highlights the boundaries as a new degree of freedom to regulate bulk Weyl quasiparticles.

关键词： Degrees of freedom (mechanics)

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SELF-DRIVING TECH FOR NON-CARS From mall shuttles to monster trucks, Perrone Robotics is ready to debut its self-driving tech

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IEEE SPECTRUM 2019年第3期56卷 9-10页

作者： Ross, Philip E. Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang College of Information Science and Electronic Engineering Zhejiang University Hangzhou China

Like early mammals scuttering between the legs of tyrannosaurs, a lot of little companies are trying to weave around-and maybe even outlast-the big boys of self-driving technology.

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High-Order Modulation Large MIMO Detector Based on Physics-Inspired Methods

arXiv

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arXiv 2025年

作者： Zeng, Qing-Guo Cui, Xiao-Peng Tao, Xian-Zhe Hu, Jia-Qi Pan, Shi-Jie Sha, Wei E.I. Yung, Man-Hong Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen518055 China Department of Physics Fudan University Shanghai200433 China Center for Intelligent and Networked Systems Department of Automation Tsinghua University Beijing100084 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China Key Laboratory of Micro-Nano Electronic Devices and Smart Systems of Zhejiang Province College of Information Science and Electronic Engineering Zhejiang University Zhejiang Hangzhou310027 China International Quantum Academy Shenzhen518048 China Guangdong Provincial Key Laboratory of Quantum Science and Engineering Southern University of Science and Technology Shenzhen518055 China Shenzhen Key Laboratory of Quantum Science and Engineering Southern University of Science and Technology Shenzhen518055 China

Applying quantum annealing or current quantum-/physics-inspired algorithms for MIMO detection always abandon the direct gray-coded bit-to-symbol mapping in order to obtain Ising form, leading to inconsistency errors. This often results in slow convergence rates and error floor, particularly with high-order modulations. We propose HOPbit, a novel MIMO detector designed to address this issue by transforming the MIMO detection problem into a higher-order unconstrained binary optimization (HUBO) problem while maintaining gray-coded bit-to-symbol mapping. The method then employs the simulated probabilistic bits (p-bits) algorithm to directly solve HUBO without degradation. This innovative strategy enables HOPbit to achieve rapid convergence and attain near-optimal maximum-likelihood performance in most scenarios, even those involving high-order modulations. The experiments show that HOPbit surpasses ParaMax by several orders of magnitude in terms of bit error rate (BER) in the context of 12-user massive and large MIMO systems even with computing resources. In addition, HOPbit achieves lower BER rates compared to other traditional detectors. Copyright © 2025, The Authors. All rights reserved.

关键词： Maximum likelihood estimation

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2-Port GSG Probe Calibration Using TRL and 16-Term Error Model Up to 100GHz 13

2-Port GSG Probe Calibration Using TRL and 16-Term Error Mod...

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13th Asia-Pacific International Symposium on Electromagnetic Compatibility and Technical Exhibition, APEMC 2022

作者： Chen, Junhui Zhang, Ling Li, Da Zhou, Jiefeng Wu, Chenghan Jiang, Li Li, Er-Ping Zhejiang University The Zhejiang Key Laboratory of Advanced Micro Nano Electronic Devices & Smart Systems and Applications Hangzhou China

ISBN: (数字)9781665416719

ISBN: (纸本)9781665416719

This paper introduces two calibration methods - Thru-Reflect-Line (TRL) and 16-term error model - and explores the influence of crosstalk errors of different intensities on the calibration accuracy of the two methods through full-wave simulation. The 2-port network is calibrated up to 100GHz by TRL and 16-term error model respectively through the GSG probe and calibration standards. When there is strong crosstalk between the two ports, the calibration accuracy of TRL will be deteriorated, while using the 16-term error model for calibration can effectively improve the calibration accuracy when there is a strong crosstalk error. When the crosstalk intensity is small, the accuracy of the 16-term error model is also slightly higher than that of TRL. © 2022 IEEE.

关键词： Crosstalk

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Electromagnetic Wave Dispersion Curve Computation for Quasi-1D Spoof Surface Plasmon Polaritons

Electromagnetic Wave Dispersion Curve Computation for Quasi-...

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2024 International Applied Computational Electromagnetics Society Symposium, ACES-China 2024

作者： Zhou, Jiefeng Zhang, Ling Li, Da Li, Er-Ping Zhejiang University Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems and Applications Hangzhou China

ISBN: (纸本)9798350355581

The quasi-one-dimensional (quasi-1D) spoof surface plasmon polariton (SSPP) provides a new route for optically transparent electronic devices. The dispersion curves can control the electromagnetic wave propagation characteristics of the quasi-1D SSPP by manipulating the geometric parameters. However, the dispersion curves of quasi-1D SSPP have not been analytically derived and thoroughly studied. This paper derives the dispersion curves of the quasi-1D SSPP using equivalent permittivity and permeability methods, which can accurately predict the relationship between wave number and its geometric parameters. The simulation results validate the proposed dispersion curves. Based on the dispersion curves, this paper further presents a broadband optically transparent transmission line, which can achieve high-efficiency transmission from 3.0 to 14.4 GHz. © 2024 IEEE.

关键词： Surface plasmon resonance

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Temporal Neural Encoding Methods for Spiking Neural Networks 13

Temporal Neural Encoding Methods for Spiking Neural Networks

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13th Asia-Pacific International Symposium on Electromagnetic Compatibility and Technical Exhibition, APEMC 2022

作者： Chen, Quankun Li, Da Tao, Tuomin Ma, Hanzhi Li, Erping Zhejiang University The Zhejiang Key Lab. of Advanced Micro/Nano Electronic Devices Smart Systems and Applications Hangzhou China

ISBN: (数字)9781665416719

ISBN: (纸本)9781665416719

Spike neural networks (SNNs) have gained growing attention, and the temporal encoding methods for the signal input are also crucial. Among these encoding algorithms, a suitable and simple encoding method not only affects the performance of the SNNs but also relates to the expansion in hardware. Several high-performance and easily realized encoding algorithms are discussed in this paper. © 2022 IEEE.

关键词： Network coding

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A Miniaturized Absorber for Radiation Suppression in the Chip Package 7

A Miniaturized Absorber for Radiation Suppression in the Chi...

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7th IEEE International Symposium on Electromagnetic Compatibility, ISEMC 2023

作者： Lin, Chaolong Xing, Jiaqi Li, Da Li, Er-Ping Zhejiang University The Zhejiang Key Lab. of Advanced Micro/Nano Electronic Devices Smart Systems and Applications Hangzhou China

ISBN: (纸本)9798350333107

In this page, a miniaturized absorber with ultrawide absorption band is designed and applied for radiation leakage suppression in the chip package. The proposed unit is a double-layer structure with two patterned resistive films of ITO etched on top of the dielectric substrate. The patterned layer is composed of a meandering square ring and a centric circular patch which enhances the coupling within the unit and facilitates the miniaturization of the structure. The size of the unit is 0.08λL× 0.08λL(λL is the wavelength in the free space of the lowest absorption frequency). When the periodic boundary condition is set in the simulation, it shows a broad absorption band (S11-10dB) covering 23.8-40 GHz. This unit is then used as a square ring structure for radiation suppression in chip package which demonstrates a -10dB bandwidth within 25.5-39.5 GHz. © 2023 IEEE.

关键词： Dielectric materials

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A Novel 3-D Frequency Selective Surface With Ultrawide Passband and High Selectivity 11

A Novel 3-D Frequency Selective Surface With Ultrawide Passb...

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11th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2023 - Proceedings

作者： An, Xiaodong Xie, Jialong Li, Da Fan, Yudi Li, Erping Zhejiang University The Zhejiang Key Lab. of Advanced Micro/Nano Electronic Devices Smart Systems and Applications Hangzhou310000 China

ISBN: (纸本)9798350326277

In this paper, a novel 3-dimensional (3-D) frequency selective surface (FSS) structure with ultrawide passband and high selectivity is proposed. Compared to traditional two-dimensional (2-D) wideband structures, (3-D) structures offer enhanced selectivity but exhibit higher insertion loss in the passband. Moreover, three-dimensional structures are often more complex and challenging to manufacture. This paper proposes a simplified three-layer structure. When vertically incident, the FSS exhibits a -3 dB bandwidth of 8-18.4 GHz with a relative bandwidth of 78.7%. Additionally, it forms a stopband with a suppression level exceeding -10 dB within the frequency range of 0-5.2 GHz. In the TE mode, the FSS maintains excellent operational performance within an incident angle range of 0-40 degrees. © 2023 IEEE.

关键词： frequency selective surface passband wideband

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Bayesian Machine Learning for Extracting Parasitic Parameters of GSG Calibration Standards 13

Bayesian Machine Learning for Extracting Parasitic Parameter...

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13th Asia-Pacific International Symposium on Electromagnetic Compatibility and Technical Exhibition, APEMC 2022

作者： Zhou, Jiefeng Zhang, Ling Li, Da Chen, Junhui Wu, Chenghan Jiang, Li Li, Er-Ping Zhejiang University College of Information Science and Electronic Engineering The Zhejiang Key Laboratory of Advanced Micro Nano Electronic Devices & Smart Systems and Applications Hangzhou China

ISBN: (数字)9781665416719

ISBN: (纸本)9781665416719

This paper proposes a method to extract the parasitic parameters of the calibration standards by using the Bayesian optimization algorithm. After several rounds of optimization, the parasitic parameters are optimized so that the calculated value is closest to the full-wave simulation value. The advantage is that only one S-parameter of a known device needs to be used to obtain the parasitic parameters of all calibration standards. Compared with traditional measurement methods, it has the advantages taking less measurement times and coverage of frequency bandwidth. To prove the validity of the technique, the S-parameter of the 4mm microstrip line was simulated as a reference. The extracted parasitic parameters were used in the 16-term error model, the calibration and simulation results are in good agreement up to 100GHz. © 2022 IEEE.

关键词： Scattering parameters

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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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