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Design and System (IEDS), International EOS/ESD Symposium on

作者： Xinyu Zhu Fangjun Yu Feifan Deng Yipeng Chen Shurong Dong Key Laboratory of Micro-nano Electronic Devices and Smart Systems of Zhejiang Province College of Information Science & Electronic Engineering Zhejiang University Hangzhou China

Neural network modeling method for predicting the electro-static discharge (ESD) window of Gate-Grounded NMOS (GGNMOS) is introduced in this work. Compared with TCAD simulation, the time consumption is reduced by 6 or... 详细信息

ISBN: (数字)9781585373383

ISBN: (纸本)9781665469814

关键词： Neural networks Predictive models Logic gates Electrostatic discharges Discharges (electric) MOS devices

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A Novel Four-Port Calibration Method for High Frequency On-Wafer S-parameter Measurement

A Novel Four-Port Calibration Method for High Frequency On-W...

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International Conference on microwave and Millimeter Wave Technology Proceedings

作者： Jiefeng Zhou Ling Zhang Junhui Chen Da Li Ding Zhou Er-Ping Li College of Information Science and Electronic Engineering and The Zhejiang Key Laboratory of Advanced Micro/Nano Electronic Devices & Smart Systems and Applications Zhejiang University Hangzhou China High-Speed and High-Frequency Lab Huawei Technologies Co. Ltd Dongguan China

This paper proposes a novel four-port calibration method for on-wafer S-parameter measurement. Crosstalk terms can seriously deteriorate the measurement accuracy of high-frequency on-wafer systems. The proposed method can consider all error and crosstalk terms in on-wafer measurement using two ground-signal-signal-ground (GSSG) probes and ensure high calibration accuracy. Only six calibration standards are required to complete the four-port calibration by this method. The proposed method is verified by full-wave simulations up to 100 GHz. The simulation and calibration results are in great agreement, which proves the correctness and reliability of the proposed method.

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Higher-Order Topological In-Bulk Corner State in Pure Diffusion systems

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Physical Review Letters 2024年第17期132卷 176302-176302页

作者： Zhoufei Liu Pei-Chao Cao Liujun Xu Guoqiang Xu Ying Li Jiping Huang Department of Physics State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (MOE) Fudan University Shanghai 200438 China 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 Key Laboratory of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang The Electromagnetics Academy of Zhejiang University Zhejiang University Haining 314400 China Shaoxing Institute of Zhejiang University Zhejiang University Shaoxing 312000 China Graduate School of China Academy of Engineering Physics Beijing 100193 China Department of Electrical and Computer Engineering National University of Singapore Kent Ridge 117583 Republic of Singapore

Compared with conventional topological insulator that carries topological state at its boundaries, the higher-order topological insulator exhibits lower-dimensional gapless boundary states at its corners and hinges. Leveraging the form similarity between Schrödinger equation and diffusion equation, research on higher-order topological insulators has been extended from condensed matter physics to thermal diffusion. Unfortunately, all the corner states of thermal higher-order topological insulator reside within the band gap. Another kind of corner state, which is embedded in the bulk states, has not been realized in pure diffusion systems so far. Here, we construct higher-dimensional Su-Schrieffer-Heeger models based on sphere-rod structure to elucidate these corner states, which we term “in-bulk corner states.” Because of the anti-Hermitian properties of diffusive Hamiltonian, we investigate the thermal behavior of these corner states through theoretical calculation, simulation, and experiment. Furthermore, we study the different thermal behaviors of in-bulk corner state and in-gap corner state. Our results would open a different gate for diffusive topological states and provide a distinct application for efficient heat dissipation.

关键词： Fourier's law Heat transfer Metamaterials

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Mechanical motion tuned carrier transport characteristic of dynamic diode

arXiv

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arXiv 2023年

作者： Yang, Zunshan Zhong, Huikai Wang, Can Lu, Yanghua Feng, Lixuan Yu, Xutao Liu, Chang Lin, Shisheng College of Information Science and Electronic Engineering Zhejiang University Hangzhou310027 China Nanchang Hangkong University Nanchang330063 China State Key Laboratory of Modern Optical Instrumentation Zhejiang University Hangzhou310027 China Key Laboratory of Advanced Micro/Nano Electronic Devices & Smart Systems and Applications of Zhejiang Zhejiang University Hangzhou310027 China

Since the invention of dynamic diode, its physical properties and potential applications have attracted wide attentions. A lot of attempts have been made to harvest the rebounding current and voltage of dynamic diode. However, the underlying physical mechanism of its carrier transport characteristic was rarely explored carefully. Here, the electrical transport properties of the dynamic diode are systematically investigated with a mechanical motion tuned method, where the dynamic current-voltage curve shows a gentler growth trend compared to the static curve. The rebounding current increases with motion velocity and contact force, resulting in a reduced current with the same bias voltage and an oscillation current with a changing velocity and force. Besides, we propose a circuit model with an accurate mathematical formula expression to describe the oscillation current, where an imaginary parameter η0 is creatively added to the exponential growth term. This work shows a physical picture of adjust microscopic carrier motion with macroscopic mechanical motion, which provides strong theoretical support for designing dynamic diode devices with better performance in the future. © 2023, CC BY.

关键词： Diodes

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Unconventional Weyl exceptional contours in non-Hermitian photonic continua

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Photonics Research 2021年第12期9卷 2435-2442页

作者： QINGHUI YAN QIAOLU CHEN LI ZHANG RUI XI HONGSHENG CHEN YIHAO YANG Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical InstrumentationZJU-Hangzhou Global Scientific and Technological Innovation CenterZhejiang UniversityHangzhou 310027China International Joint Innovation Center Key Laboratory of Advanced Micro/Nano Electronic Devices&Smart Systems of ZhejiangThe Electromagnetics Academy at Zhejiang UniversityZhejiang UniversityHaining 314400China

Unconventional Weyl points with topological charges higher than 1 can transform into various complex unconventional Weyl exceptional contours under non-Hermitian ***,theoretical studies of these exceptional contours have been limited to tight-binding ***,we propose to realize unconventional Weyl exceptional contours in photonic continua—non-Hermitian anisotropic chiral plasma,based on ab initio calculation by Maxwell’s *** perturbing in-plane permittivity,an unconventional Weyl point can transform into a quadratic Weyl exceptional ring,a type I Weyl exceptional chain with one chain point,a type II Weyl exceptional chain with two chain points,or other *** metamaterials with effective constitutive parameters are proposed to implement these unconventional Weyl exceptional *** work paves a way toward exploration of exotic physics of unconventional Weyl exceptional contours in non-Hermitian topological photonic continua.

关键词： exceptional topological constitutive

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Long Term Online Desalting Analysis of Ms/Lc-Ms Using Thermal Assisted Recrystallization Ionization

SSRN

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SSRN 2024年

作者： Chen, Weiwei Yuan, Kailong He, Quan Li, Qing Luo, Jing Chu, Fengjian Wang, Huiwen Feng, Hongru Pan, Yuanjiang Department of Chemistry Zhejiang University Zhejiang Hangzhou310027 China China Tobacco Zhejiang Industrial Co. Ltd. Zhejiang Hangzhou310008 China Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang College of Information Science and Electronic Engineering Zhejiang University Zhejiang Hangzhou310027 China Analysis Center of Agrobiology and Environmental Sciences Zhejiang University Zhejiang Hangzhou310027 China

Mass spectrometric analysis of samples containing non-volatile salts remains challenging due to salt-induced ion suppression and contamination. This challenge is even more pronounced for a liquid chromatography-mass spectrometry analysis, where the accumulation of salts in the transmission system poses an ongoing problem. In this study, a novel thermal assisted recrystallization ionization (TARI) device was developed to achieve efficient on-line desalting and prolonged analysis of saline samples. The core component of this device is a heated plate positioned between the electrospray unit and the MS inlet. The feasibility of TARI in sample desalting and analysis was demonstrated by its successful application in the analysis of eight drugs dissolved in eight high-salt solutions, including four common buffers and four non-volatile salt solutions. TARI demonstrates high desalting capability, realizing analysis of samples dissolved in up to 0.5 mol/L PBS buffers and allowing continuous analysis for up to nearly one hour without maintenance. The high sensitivity, repeatability, linearity, accuracy, and intra- and inter-day precision of TARI confirm its reliability as a robust tool for the analysis of saline samples. Furthermore, the practicality of LC-TARI-MS was validated on a five-drug mixture and a crude aripiprazole product. Finally, six impurities in the crude aripiprazole product were successfully detected by LC-TARI-MS (in contrast to only one detected by LC-ESI-MS when ammonium acetate was used as the mobile phase). The established method holds promise for applications across academic and pharmaceutical domains. © 2024, The Authors. All rights reserved.

关键词： Salts

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Reconfigurable, zero-energy, and wide-temperature loss-assisted thermal nonreciprocal metamaterials

arXiv

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arXiv 2024年

作者： Lei, Min Jin, Peng Zhou, Yuhong Li, Ying Xu, Liujun Huang, Jiping Department of Physics State Key Laboratory of Surface Physics Key Laboratory of Micro and Nano Photonic Structures Ministry of Education Fudan University Shanghai200438 China State Key Laboratory of Extreme Photonics and Instrumentation Key Laboratory of Advanced Micro Nano Electronic Devices & Smart Systems of Zhejiang Zhejiang University Hangzhou310027 China International Joint Innovation Center The Electromagnetics Academy of Zhejiang University Zhejiang University Haining314400 China Shaoxing Institute of Zhejiang University Zhejiang University Shaoxing312000 China Graduate School of China Academy of Engineering Physics Beijing100193 China

Thermal nonreciprocity plays a vital role in chip heat dissipation, energy-saving design, and high-temperature hyperthermia, typically realized through the use of advanced metamaterials with nonlinear, advective, spatiotemporal, or gradient properties. However, challenges such as fixed structural designs with limited adjustability, high energy consumption, and a narrow operational temperature range remain prevalent. Here, a systematic framework is introduced to achieve reconfigurable, zero-energy, and wide-temperature thermal nonreciprocity by transforming wasteful heat loss into a valuable regulatory tool. Vertical slabs composed of natural bulk materials enable asymmetric heat loss through natural convection, disrupting the inversion symmetry of thermal conduction. The reconfigurability of this system stems from the ability to modify heat loss by adjusting thermal conductivity, size, placement, and quantity of the slabs. Moreover, this structure allows for precise control of zero-energy thermal nonreciprocity across a broad temperature spectrum, utilizing solely environmental temperature gradients without additional energy consumption. This research presents a different approach to achieving nonreciprocity, broadening the potential for nonreciprocal devices such as thermal diodes and topological edge states, and inspiring further exploration of nonreciprocity in other loss-based systems. Copyright © 2024, The Authors. All rights reserved.

关键词： Metamaterials

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Security Device Based on Terahertz Metasurface with Robust High-Order BIC

Security Device Based on Terahertz Metasurface with Robust H...

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International Symposium on Antennas, Propagation and EM Theory (ISAPE)

作者： Qun Ren Xiaoman Wang Yongshan Liang Luxing Zhang Xiuyu Wang Wei E. I. Sha School of Electrical and Information Engineering Tianjin University Tianjin China Purple Mountain Laboratories Nanjing China Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology School of Microelectronics Tianjin University Tianjin China Key Laboratory of Micro-Nano Electronic Devices and Smart Systems of Zhejiang Province College of Information Science and Electronic Engineering Zhejiang University Hangzhou China

ISBN: (数字)9798350353129

ISBN: (纸本)9798350353136

Metasurfaces are widely used in terahertz sensing and communication devices for their ability to modulate terahertz waves in multiple dimensions. Metasurface devices based on the Dynamic Heterogeneous Redundancy (DHR) architecture have been shown to enhance the confidentiality and security of terahertz wave wireless communication. High-order BICs are particularly intriguing because of their strong resilience to structural defects. As a result, we propose an aluminum-graphene hybrid metasurface with high-order BIC, and leverage the robustness of the high-order BIC to design security hardware based on DHR architecture.

关键词： Wireless communication Redundancy Wires Computer architecture Switches Metasurfaces Robustness Hardware Software Security

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Comparative study of Hermitian and non-Hermitian topological dielectric photonic crystals

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Physical Review A 2021年第3期104卷 033501-033501页

作者： Menglin L. N. Chen Li Jun Jiang Shuang Zhang Ran Zhao Zhihao Lan Wei E. I. Sha Key Laboratory of Micro-nano Electronic Devices and Smart Systems of Zhejiang Province College of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China

The effects of gain and loss on the band structures of a bulk topological dielectric photonic crystal (PC) with C6v symmetry and the PC-air-PC interface are studied based on first-principle calculation. To illustrate the importance of parity-time (PT) symmetry, three systems are considered, namely the PT-symmetric, PT-asymmetric, and lossy systems. We find that the system with gain and loss distributed in a PT symmetric manner exhibits a phase transition from a PT exact phase to a PT broken phase as the strength of the gain and loss increases, while for the PT-asymmetric and lossy systems, no such phase transition occurs. Furthermore, based on the Wilson loop calculation, the topology of the PT-symmetric system in the PT exact phase is demonstrated to keep unchanged as the Hermitian system. At last, different kinds of edge states in Hermitian systems under the influences of gain and loss are studied and we find that while the eigenfrequencies of nontrivial edge states become complex conjugate pairs, they keep real for the trivial defect states.

关键词： Optical & microwave phenomena Photonic crystals Topological effects in photonic systems

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A Novel Physics-Assisted Genetic Algorithm (PAGA) for Decoupling Capacitor Optimization

TechRxiv

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TechRxiv 2023年

作者： Jiang, Li Zhang, Ling Tan, Shurun Li, Da Hwang, Chulsoon Fan, Jun Li, Er-Ping The Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems and Applications College of Information Science and Electronic Engineering Zhejiang University Hangzhou310027 China The Electromagnetic Compatibility Laboratory Missouri University of Science and Technology RollaMO65409 United States ZJU-UIUC Institute Zhejiang University Haining314400 China

This article proposes a new physics-assisted genetic algorithm (PAGA) for decoupling capacitor (decap) optimization in power distribution networks (PDNs), which is, by far, the most powerful approach to efficiently minimizing the number of decaps within an enormous search space. In the proposed PAGA method, the priority of the decap ports is first determined based on their physical loop inductances. Then, an initial solution is quickly obtained by placing decaps sequentially on the port with the highest priority. Subsequently, a GA with prior physical knowledge is developed to find better decap solutions progressively. A port removal scheme that eliminates the low-priority ports and a modified mutation operation that better guides the mutation direction is proposed to accelerate the convergence of the GA. The initial solution and the proposed auxiliary schemes can significantly narrow the search space and incorporate physical knowledge into the GA, thus greatly accelerating the convergence process. Several representative state-of-the-art algorithms and commercial tools are thoroughly compared with the proposed PAGA in different application scenarios. The proposed PAGA shows remarkably better performance in efficiently finding high-quality decap solutions and exhibits strong robustness to handle real-world and large-scale problems, which brings decap optimization algorithms to a new benchmark. © 2023, CC BY.

关键词： Genetic algorithms

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