检索结果-内蒙古大学图书馆

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

来源：评论

学校读者我要写书评

暂无评论

Large-area quantum-spin-Hall waveguide states in a three-layer topological photonic crystal heterostructure

引用

Physical Review A 2023年第4期107卷 L041501-L041501页

作者： Zhihao Lan Menglin L. N. Chen Jian Wei You Wei E. I. Sha Department of Electronic and Electrical Engineering University College London Torrington Place London WC1E 7JE United Kingdom Department of Electronic and Information Engineering The Hong Kong Polytechnic University Kowloon Hong Kong China State Key Laboratory of Milimeter Waves Institute of Electromagnetic Space Southeast University Nanjing China 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

Topological photonic edge states are conventionally formed at the interface between two domains of topologically trivial and nontrivial photonic crystals. Recent works exploiting photonic quantum Hall and quantum-valley-Hall effects have shown that large-area topological waveguide states could be created in a three-layer topological heterostructure that consists of a finite-width domain featuring a Dirac cone sandwiched between two domains of photonic crystals with opposite topological properties. In this Letter, we show that an alternative kind of large-area topological waveguide state could be created employing the photonic analogs of the quantum-spin-Hall effect. Taking the well-used Wu-Hu model in topological photonics as an example, we show that sandwiching a finite-width domain of photonic crystals featuring a double Dirac cone between two domains of expanded and shrunken unit cells could lead to the emergence of large-area topological helical waveguide states distributed uniformly in the middle domain. Importantly, we unveil a power-law scaling related to the size of the band gap within which the large-area helical states reside as a function of the width of the middle domain, which implies that these large-area modes in principle could exist in the middle domain with arbitrary width. Moreover, pseudospin-momentum-locking unidirectional propagations and the robustness of these large-area waveguide modes against sharp bends are explicitly demonstrated. Our work broadens the photonic systems and platforms that could be utilized for large-area-mode–enabled topological waveguiding.

关键词： Photonic crystals Topological effects in photonic systems

来源：评论

学校读者我要写书评

暂无评论

Topological transitions and topological beam splitters in gyromagnetic metamaterials

引用

Physical Review B 2024年第8期109卷 085429-085429页

作者： Mingzhu Li Ning Han Lu Qi Yu Yan Rui Zhao Shutian Liu School of Information and Electrical Engineering Hangzhou City University Hangzhou 310015 China Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical Instrumentation College of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China ZJU-Hangzhou Global Science and Technology Innovation Center Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang ZJU-UIUC Institute Zhejiang University Hangzhou 310027 China School of Physical Science and Technology Yangzhou University Yangzhou 225002 China School of Physics Harbin Institute of Technology Harbin 150001 China

Topological transitions unveil a fundamentally novel pathway of research, revealing captivating optical phenomena in electromagnetic metamaterials. In this work, we give comprehensive pictures of topological phase diagrams and topological transitions in the gyromagnetic metamaterials (GMs). We comprehensively demonstrate the topology of all types of equifrequency surfaces of the GMs. The Weyl points and the nodal line can coexist in the GMs, and they are the critical points in the topological transitions. The localized Fermi arc surface states exist at the boundary between the vacuum state and GMs owing to the bulk-edge correspondence of the material system. Full-wave simulations reveal that topological surface waves can smoothly transmit forward around the square defect without reflection or scattering. Remarkably, different types of topological beam splitters are demonstrated utilizing the topological surface waves in the GMs. We theoretically demonstrate that the physical mechanism of achieving the topological beam splitters is caused by different group velocity directions of the Fermi arcs surface states of the material system. Moreover, the topological wave division and controllable propagation of the Fermi arc surface states can be achieved by adopting the different boundary configurations and gyromagnetic parameters in the topological beam splitters. Our work could broaden insights into topological wave physics and provide more flexibility for photonic devices in the electromagnetic media.

关键词： Metamaterials Non-reciprocal propagation Surface states Topological effects in photonic systems Topological phase transition Weyl semimetal

来源：评论

学校读者我要写书评

暂无评论

System Efficient ESD Design of IO ESD Protection

System Efficient ESD Design of IO ESD Protection

引用

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

作者： Feifan Deng Xinyu Zhu Fangjun Yu Yipeng Chen Hongyu Shen 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 Huawei Technology Co. Ltd Shanghai China

The failure mode often encountered in System Efficient ESD Design (SEED) is proposed based on a case, that is, the failure caused by the mismatch between the on-board TVS and the ESD Clamp in the chip. The paper prese... 详细信息

ISBN: (数字)9781585373383

ISBN: (纸本)9781665469814

关键词： TV Electrostatic discharges Clamps

来源：评论

学校读者我要写书评

暂无评论

Higher order BIC of metasurface excited by magnetic EIT

Higher order BIC of metasurface excited by magnetic EIT

引用

International Applied Computational Electromagnetics Society Symposium (ACES)

作者： Qun Ren Fangmiao Wang Yongjing Dang Xiaoman Wang Jianwei You Xiuyu Wang Wei E. I. Sha School of Electrical and Information Engineering Tianjin University Tianjin China Purple Mountain Laboratories Nanjing China State Key Laboratory of Millimeter Waves School of Information Science and Engineering Southeast University 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)9798350355581

ISBN: (纸本)9798350355598

Metasurfaces enable complex modulation of terahertz waves. However, the quality factor of metallic metasurfaces is often limited by intrinsic ohmic losses. The concept of bound states in the continuum (BIC) has been proposed to enhance terahertz-matter interactions. High order BICs have garnered attention due to their robustness. Previous studies on high-order BICs focused on photonic crystals, requiring high structural symmetry. In this paper, we propose a metasurface design based on the magnetic Electromagnetic induced transparency (EIT) effect to excite higher-order BIC eigenmodes. This novel approach and the resulting robust modes hold great potential for terahertz sensing and communication applications.

关键词： Q-factor Optical losses Electric potential Modulation Photonic crystals Metasurfaces Computational electromagnetics Robustness Sensors Electromagnetics

来源：评论

学校读者我要写书评

暂无评论

Two-dimensional materials for future information technology: status and prospects

引用

Science China(Information Sciences) 2024年第6期67卷 1-147页

作者： Hao QIU Zhihao YU Tiange ZHAO Qi ZHANG Mingsheng XU Peifeng LI Taotao LI Wenzhong BAO Yang CHAI Shula CHEN Yiqi CHEN Hui-Ming CHENG Daoxin DAI Zengfeng DI Zhuo DONG Xidong DUAN Yuhan FENG Yu FU Jingshu GUO Pengwen GUO Yue HAO Jun HE Xiao HE Jingyi HU Weida HU Zehua HU Xinyue HUANG Ziyang HUANG Ali IMRAN Ziqiang KONG Jia LI Qian LI Weisheng LI Lei LIAO Bilu LIU Can LIU Chunsen LIU Guanyu LIU Kaihui LIU Liwei LIU Sheng LIU Yuan LIU Donglin LU Likuan MA Feng MIAO Zhenhua NI Jing NING Anlian PAN Tian-Ling REN Haowen SHU Litao SUN Yue SUN Quanyang TAO Zi-Ao TIAN Dong WANG Hao WANG Haomin WANG Jialong WANG Junyong WANG Wenhui WANG Xingjun WANG Yeliang WANG Yuwei WANG Zhenyu WANG Yao WE... Department of Applied Physics The Hong Kong Polytechnic University Key Laboratory for Micro-Nano Physics and Technology of Hunan Province College of Materials Science and EngineeringHunan University College of Integrated Circuits Zhejiang University Shenzhen Geim Graphene Center Shenzhen Key Laboratory of Layered Materials for Value-Added ApplicationsTsinghua-Berkeley Shenzhen Institute & Institute of Materials ResearchTsinghua Shenzhen International Graduate SchoolTsinghua University State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZijingang CampusZhejiang University National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications i-LabSuzhou Institute of Nano-Tech and Nano-Bionics (SINANO)Chinese Academy of Sciences College of Chemistry and Chemical Engineering Hunan University Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education) Department of PhysicsRenmin University of China School of Integrated Circuits Beijing National Research Center for Information Science and Technology (BNRist)Tsinghua University School of Electronic Science and Engineering Nanjing University The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology Shaanxi Joint Key Laboratory of GrapheneSchool of MicroelectronicsXidian University Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education School of Physics and TechnologyWuhan University School of Integrated Circuits Huazhong University of Science and Technology Center for Nanochemistry (CNC) Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking University State Key Laboratory for Artificial Microstruct

Over the past 70 years, the semiconductor industry has undergone transformative changes,largely driven by the miniaturization of devices and the integration of innovative structures and materials. Two-dimensional(2D) materials like transition metal dichalcogenides(TMDs) and graphene are pivotal in overcoming the limitations of silicon-based technologies, offering innovative approaches in transistor design and functionality, enabling atomic-thin channel transistors and monolithic 3D integration. We review the important progress in the application of 2D materials in future information technology, focusing in particular on microelectronics and optoelectronics. We comprehensively summarize the key advancements across material production, characterization metrology, electronic devices, optoelectronic devices, and heterogeneous integration on silicon. A strategic roadmap and key challenges for the transition of 2D materials from basic research to industrial development are outlined. To facilitate such a transition, key technologies and tools dedicated to 2D materials must be developed to meet industrial standards, and the employment of AI in material growth, characterizations, and circuit design will be essential. It is time for academia to actively engage with industry to drive the next 10 years of 2D material research.

关键词： two-dimensional (2D) materials information technology production technology standardization of characterization microelectronic devices optoelectronic devices multi-functional integration

来源：评论

学校读者我要写书评

暂无评论

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

SSRN

引用

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

来源：评论

学校读者我要写书评

暂无评论

Integrated plasmonic ruler using terahertz multi-BIC metasurface for digital biosensing

引用

Moore and More 2025年第1期2卷 1-13页

作者： Ren, Qun Jia, Sheng Li, Jingtong He, Liu Xu, Yan Huang, Hao Wang, Xiaoman Ooi, ZherYian Liang, Yongshan Zhang, Yaoyin Xu, Hang Zhang, Zhang You, Jianwei Sha, Wei E. I. Yao, Jianquan School of Electrical and Information Engineering Tianjin University Tianjin China Department of Ultrasound Diagnosis and Treatment Tianjin Medical University Cancer Institute and Hospital Tianjin China Key Laboratory of Opto-Electronics Information Technology Ministry of Education School of Precision Instruments and Opto-Electronics Engineering Tianjin University Tianjin China Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology School of Microelectronics Tianjin University Tianjin China School of Electronic and Information Engineering Changshu Institute of Technology Jiangsu China State Key Laboratory of Millimeter Waves School of Information Science and Engineering Southeast University Nanjing 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

In recent years, continuous bound states in the continuum (BIC) have gained significant attention for their practical applications in optics, chip technology, and modern communication. Traditional approaches to realizing and analyzing BIC typically rely on magnetic dipole models, which have limitations in quantitative analysis and integration. This creates a gap in understanding how to efficiently harness BIC with higher Q-factors for enhanced performance in real-world applications, particularly in scenarios involving terahertz imaging and multi-channel communication. In this study, we introduce a novel approach using a metallic resonator model that leverages toroidal dipole moments to generate symmetry-protected BIC with high Q-factors. By systematically varying the asymmetry parameters of the metasurface, we gradually break its symmetry, achieving a transition from the BIC mode to the quasi-BIC mode and facilitating the gradual release of stored electromagnetic energy. Our theoretical analysis confirms the existence and generation of BIC, and experimental measurements of the transmission response spectrum validate these theoretical predictions. The results indicate that terahertz metasurface with high Q-factors can produce strong resonances at specific frequencies, enhancing resistance to electromagnetic interference and ensuring stable imaging quality in complex environments. Additionally, this study suggests the potential for an integrated plasmonic ruler to achieve high-resolution and efficient biological imaging. These findings bridge the gap by demonstrating how high Q-factor BIC can be effectively utilized for multi-channel terahertz dynamic imaging and biosensing applications. This advancement lays a new foundation for developing robust systems in multi-channel communication and biomedical sensing, offering significant potential for future technological and medical innovations.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Geometric heat pumping under continuous modulation in thermal diffusion

arXiv

引用

arXiv 2024年

作者： Yan, Hao-Ran Cao, Pei-Chao Wang, Yan-Xiang Zhu, Xue-Feng Li, Ying State Key Laboratory of Extreme Photonics and Instrumentation Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang Zhejiang University Hangzhou310027 China School of Physics Innovation Institute Huazhong University of Science and Technology Wuhan430074 China International Joint Innovation Center The Electromagnetics Academy at Zhejiang University Zhejiang University Haining314400 China Shaoxing Institute Zhejiang University Shaoxing312000 China

Berry (geometric) phase has attracted a lot of interest and permeated into all aspects of physics including photonics, crystal dynamics, electromagnetism and heat transfer since it was discovered, leading to various unprecedented effects both in classical and quantum systems, such as Hannay angle, quantum Hall effect, orbital magnetism and Thouless pumping. Heat pumping is one of the most prominent and fantastic application of geometric phase in heat transport. Here we derive a general heat pumping theory based on classical diffusion equation and continuous modulation of system parameters in macroscopic thermal diffusion system and obtain a formula which is reminiscent of contact between Berry phase and the Berry curvature. Furthermore, we discuss two cases of non-trivial zero heat flux after one cycle which is fundamentally different from the trivial zero heat flux generated by static zero heat bias in physical nature. Then we analyze the dependence of the effect on the system thermal parameters, including some counterintuitive phenomenon. Finally, under the guidance of this theory, we conduct an experiment to demonstrate the accuracy and effectiveness of our theory and observe the heat pumping effect regardless of the presence and the absence of the thermal bias between two ports of system. In general, our work clearly derives the universal form of heat pumping theory under arbitrary form of the modulation in the macroscopic thermal diffusion system, this is of great significance for better heat energy transport, heat manipulation and so on. It also establishes the foundation of achieving other non-reciprocity devices or topological devices with the aid of spatiotemporal modulation. © 2024, CC BY.

关键词： Geometry

来源：评论

学校读者我要写书评

暂无评论

Triply degenerate topological phase and stretchable Fermi arc surface states in gyromagnetic metamaterials

引用

Physical Review B 2023年第3期108卷 035422-035422页

作者： Mingzhu Li Ning Han Lu Qi Liang Peng School of Information and Electrical Engineering Hangzhou City University Hangzhou 310015 China Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical Instrumentation College of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China ZJU-Hangzhou Global Science and Technology Innovation Center Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang ZJU-UIUC Institute Zhejiang University Hangzhou 310027 China School of Physical Science and Technology Yangzhou University Yangzhou 225002 China

Triple-fold band degeneracy (TBD) is an intriguing phase of topological semimetals which appears as the intermediate state between the four-folded degenerated Dirac points and the two-folded Weyl points. The resemblance of TBD in the photonics is interesting, because it indicates nonzero Berry curvature in momentum space and nontrivial topological property in real space. Recently, it was reported that TBD could be realized in the classical wave systems including phononic and photonic crystals. Unfortunately, those periodic structures can hardly provide a systematic strategy nor a compact layout in practical implementations. Hence, the resemblance of TBD is still a big challenge in topological photonics. In this work, we demonstrate that homogeneous gyromagnetic metamaterials (GMs) can be a good framework to stimulate the peculiar TBD. We discuss the emulation of triple degeneracy in dispersive GMs by carefully tuning the constitutive parameters. The introduction of nonlocality in the constitutive parameter of GMs provides the freedom of topology control of the GMs. Further, Fermi arc surface states are discussed and shown to be reflectionless against sharp corners. Remarkably, Fermi arc surface states, which occur at the boundary between the vacuum and the GMs, can be stretchable by tailoring the gap width of the GM's band structure. Our work provides a practical and flexible route to resemble TBD, which is of fundamental importance in designing reflectionless and unidirectional photonic topological devices.

关键词： Electron-cyclotron plasma waves Magneto-optics Surface states Topological effects in photonic systems Topological materials

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：