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A Review of Terahertz Sources Based on Planar Schottky Diodes

Chinese Journal of Electronics 2022年第3期31卷 467-487页

作者： KOU Wei LIANG Shixiong ZHOU Hongji DONG Yazhou GONG Sen yang ziqiang ZENG Hongxin University of Electronic Science and Technology of China yangtze Delta Region Institute (Huzhou) National Key Laboratory of Application Specific Integrated Circuit Hebei Semiconductor Research Institute

The special position of terahertz wave in the electromagnetic spectrum makes it possess the characteristics of orientation, broadband, penetration and low energy, which promotes the extensive research of terahertz wave in the fields of communication, radar, imaging,sensing, security inspection and so on. The solid-state terahertz sources based on semiconductor devices have attracted extensive attention in the field of terahertz information technology due to their characteristics such as being able to work at room temperature, being small in size, being easy to integrate and having good frequency stability. Terahertz planar Schottky diode is a kind of low parasitic semiconductor device. Its high cutoff frequency makes it work well in the terahertz range. The frequency multiplier based on planar Schottky diode is an important part of terahertz solid state source. In this review, the development of Schottky diodes technology in recent years have been introduced, including the structures and preparation of Schottky diodes. In addition, the current situation and performance of different types of terahertz sources based on Schottky diodes are further introduced,and the future development trend is discussed.

关键词： frequency multiplier terahertz range terahertz wave terahertz planar Schottky diode terahertz information technology terahertz solid state source semiconductor devices Schottky diodes good frequency stability security inspection frequency multipliers terahertz wave devices special position solid-state terahertz sources high cutoff frequency low parasitic semiconductor device Schottky diodes technology electromagnetic spectrum

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Summary of Cleanroom and Relevant Controlled Environment Standardization

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China Standardization 2010年第4期55卷 5-9页

作者： yang ziqiang China Association for Standardization.

This summary has introduced the development process of clean technology, and demonstrated the current status and development of cleanroom and relevant environment technology at home and abroad.

关键词： cleanroom standardization SAC/TC319

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Real-time programmable metasurface for terahertz multifunctional wave front engineering

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Light(Science & Applications) 2023年第9期12卷 1795-1806页

作者： Feng Lan Luyang Wang Hongxin Zeng Shixiong Liang Tianyang Song Wenxin Liu Pinaki Mazumder ziqiang yang Yaxin Zhang Daniel M.Mittleman Sichuan THz Communication Technology Engineering Research Center School of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 611731China yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313000China Zhangjiang Laboratory Shanghai 201204China National Key Laboratory of Solid-State Microwave Devices and Circuits Hebei Semiconductor Research InstituteShijiazhuang 050051China Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100094China University of Chinese Academy of Sciences School of ElectronicElectrical and Communication EngineeringBeijing 101408China Department of Electrical Engineering and Computer Science University of MichiganAnn ArborMI 48109USA School of Engineering Brown UniversityProvidenceRI 02912USA

Terahertz(THz)technologies have become a focus of research in recent years due to their prominent role in envisioned future communication and sensing *** of the key challenges facing the field is the need for tools to enable agile engineering of THz wave ***,we describe a reconfigurable metasurface based on GaN technology with an array-of-subarrays *** subwavelength-spaced array,under the control of a 1-bit digital coding sequence,can switch between an enormous range of possible configurations,providing facile access to nearly arbitrary wave front control for signals near 0.34 *** demonstrate wide-angle beam scanning with 1°of angular precision over 70 GHz of bandwidth,as well as the generation of multi-beam and diffuse wave fronts,with a switching speed up to 100 *** device,offering the ability to rapidly reconfigure a propagating wave front for beam-forming or diffusively scattered wide-angle coverage of a scene,will open new realms of possibilities in sensing,imaging,and networking.

关键词： wave scattered arbitrary

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Terahertz Direct Modulation Techniques for High-speed Communication Systems

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China Communications 2021年第5期18卷 221-244页

作者： Tianchi Zhou Yaxin Zhang Bo Zhang Hongxin Zeng Zhiyong Tan Xilin Zhang Lan Wang Zhi Chen Juncheng Cao Kaijun Song ziqiang yang University of Electronic Science and Technology of China ChengduChina yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313001China Key Laboratory of Terahertz Solid State Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences865 Changning RoadShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Terahertz communication technology can provide abundant frequency resources,strong confidentiality,antijamming capability,communication tracking capability and the ability to achieve highspeed data transmissions and can serve as an important technical method for high-speed communications in the *** these terahertz communication technologies,terahertz direct modulation technology is a key means to achieve low system complexity and power *** this paper,a review and outlook of terahertz direct modulation technology are proposed from the aspects of high-electron-mobilitytransistor-based terahertz direct modulation,parallelswitch terahertz direct modulation,diode-based terahertz direct modulation,quantum cascade laser-based terahertz direct modulation and new-material-based terahertz direct *** hope through this paper that more readers can gain knowledge about the development and challenges of terahertz direct modulation technology for high-speed communication systems,thus promoting the development of high-speed terahertz communication technology based on direct modulation.

关键词： THz communication THz direct modulation HEMT switches diode QCL new-material

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Explanatory Notes to Standard Compilation

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China Standardization 2004年第3期49卷 32-35页

作者： Jia Yanli yang ziqiang

Ⅰ. Basis for Standard Compilation

关键词： work

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Synthesis of iron-rich silicates under hydrous lower mantle conditions

Synthesis of iron-rich silicates under hydrous lower mantle ...

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2020年中国地球科学联合学术年会

作者： ziqiang yang Li ZHANG Center for High Pressure Science and Technology Advanced Research

Iron-bearing bridgmanite （Mg,Fe） SiO with the orthorhombic perovskite-type structure is the predominant phase in the Earth’s lower ***,its fundamental physicochemical properties and thermal stability largely influence the geodynamic process of the inner *** pressure and temperature（P-T） experiments on the system MgSiO-FeSiO have been widely conducted under the high P-T conditions corresponding to the Earth’s lower mantle.

关键词： Synthesis of iron-rich silicates under hydrous lower mantle conditions SiO

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An　Approximate　Algorithm　of　Generating　Variates　with　Arbitrary　Continuous　Statistical　Distributions

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Journal of Systems Engineering and Electronics 1996年第1期7卷 35-42页

作者： Zhang Zhengjun yang ziqiang Zhang Chunming&Feng Yuncheng(School of Management, Beijing University of Aeronautics&Astronautics, Beijing 100083, China) (Institute of Computational Math.& Set. Eng. Computing,Academia Sinica, Beijing 100080, China) (Dept. o School of Management Beijing University of Aeronautics & Astronautics Beijing 100083 China Institute of Computational Math. & Sci. Eng. Computing Academia Sinica Beijing 100080 China Dept. of Statistics University of North Carolina Chapel Hill U.S.A.

This paper discusses an approximate algorithm method which can be used to generate arbitrary non-uniform continuous variates. Percentile calculations of arbitrary continuous distributions are *** addition, the idea Of... 详细信息

关键词： Variate generation Monotonicity Curve fitting Probability computing.

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Dual-band multifunctional coding metasurface with a mingled anisotropic aperture for polarized manipulation in full space

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Photonics Research 2022年第2期10卷 416-425页

作者： Yibo PAN Feng LAN Yaxin Zhang Hongxin Zeng Luyang Wang Tianyang Song Guiju He ziqiang yang School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054China yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313001China

Integrated metasurfaces with diversified functionalities have demonstrated promising prospects for comprehensive implementations in compact 5G/6G communication systems by flexibly manipulating electromagnetic(EM)waves. Increasingly emerged multifunctional metasurfaces have successfully revealed integrated wavefront manipulations via phase gradient arrays, coding apertures, independent polarization control, asymmetric transmission/reflection, etc. However, multifunctional metasurfaces with more degrees of freedom in terms of multi-band/broadband operation frequencies, full-space coverage, and computable array factors are still in dire *** a step forward in extending manipulation dimensions, we propose and corroborate a dual-band multifunctional coding metasurface for anomalous reflection, radar cross-section reduction, and vortex beam generation through full-wave analysis and experiment. Our tri-layer meta-device comprises a shared coding aperture of splitring and cross-shaped resonators sandwiched between two layers of orthogonal wire gratings. With an approach of independent control of a reflection–transmission wavefront under orthogonal polarization states and Fabry–Perot-like constructive interference, the low-cross-talk shared coding aperture features a smooth phase shift and high efficiency for 3-bit coding in the K-band and 1-bit coding in the Ka-band. Both numerical and measured results verify that the proposed coding metasurface can effectively realize full-space EM control and improve the capacity of the information channel, which could be developed for potential applications in multifunctional devices and integrated systems.

关键词： polarization surface Dual

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Stability and crystal-structure of a new hexagonal iron-bearing hydrous phase stable at the middle lower mantle

Stability and crystal-structure of a new hexagonal iron-bear...

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2020年中国地球科学联合学术年会

作者： Lu Liu ziqiang yang Li Zhang Center for High Pressure Science and Technology Advanced Research University Of Science and Technology Of China

Iron-bearing hydrous phases, such as py-FeOOH, can significantly reduce the Vs in the deep lower mantle, which is concerned to be a cause of the complex seismological phenomena in the lower mantle1. We conducted high-pressure and high temperature experiments on the iron oxide and water in laser-heated diamond anvil cells. A new hexagonal phase(denoted as "H1-phase") appeared and was stable at 70-86 GPa, 1800 K-2300 K, corresponding to the lower mantle P-T conditions from 1600 Km to 2000 Km.

关键词： Stability and crystal-structure of a new hexagonal iron-bearing hydrous phase stable at the middle lower mantle

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Dynamic bifunctional THz metasurface via dual-mode decoupling

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Photonics Research 2022年第9期10卷 2008-2014页

作者： XUAN CONG HONGXIN ZENG SHIQI WANG QIWU SHI SHIXIONG LIANG JIANDONG SUN SEN GONG FENG LAN ziqiang yang YAXIN ZHANG Terahertz Science and Technology Research Center University of Electronic Science and Technology of ChinaChengdu 610000China College of Materials Science and Engineering Sichuan UniversityChengdu 610065China National Key Laboratory of Application Specific Integrated Circuit Hebei Semiconductor Research InstituteShijiazhuang 050051China Key Laboratory of Nanodevices and Applications Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of SciencesSuzhou 215123China yangtze Delta Region Institute(HuZhou) University of Electronic Science and Technology of ChinaHuzhou 313001China

Metasurfaces have powerful light field manipulation capabilities and have been researched and developed extensively in various *** an increasing demand for diverse functionalities,terahertz(THz)metasurfaces are also expanding their *** particular,integrating different functionalities into a single device is a compelling domain in *** this work,we demonstrate a functionally decoupled THz metasurface that can incorporate any two functions into one metasurface and switch dynamically through external *** proposed metasurface is formed by the combination of split-ring resonators and phase change material vanadium dioxide(VO_(2)).It operates in the single-ring resonant mode and double-ring resonant mode with varying VO_(2)in insulating and metallic states,*** importantly,the phase modulation is independent in two operating modes,and both cover a 360°cross-polarized phase with efficient polarization *** characteristic makes it obtain arbitrary independent phase information on the metasurface with different modes to switch dual functions ***,we experimentally demonstrate the functions of a tunable focal length and large-angle focus deflection of a THz off-axis parabolic mirror to verify the dual-function switching characteristics of the functionally decoupled *** functionally decoupled metasurface developed in this work broadens the way for the research and application of multifunctional modulation devices in the THz band.

关键词： surface. functional resonant

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