太赫兹行波管用金刚石输能窗研究进展  

Research Progress of Diamond Energy Transmission Window for Terahertz Traveling Wave Tube

作　　者：张鹏伟 宋惠 白慧萍 易剑 江南[2] 西村一仁 ZHANG Pengwei;SONG Hui;BAI Huiping;YI Jian;JIANG Nan;KAZUHITO Nishimura(School of Materials and Energy,Yunnan University,Kunming 650091,China;Ningbo Institute of Materials Technology&Engineering,China Academy of Sciences,Ningbo 315201,Zhejiang,China)

机构地区：[1]云南大学材料与能源学院,昆明650091 [2]中国科学院宁波材料技术与工程研究所,浙江宁波315201

出　　处：《材料导报》2024年第16期20-28,共9页Materials Reports

基　　金：中国科学院青年培育基金(JCPYJJ-22030)。

摘　　要：太赫兹波处于电磁波谱中电子学与光子学之间的空隙区域,具有不同于低频微波和高频光学的独特属性,在无线通信、生物医学、公共安全等军事和民用领域具有广阔的应用前景。太赫兹技术重点是对太赫兹波的产生和传输进行研究,当前所面临问题是在不产生额外传输损耗下保证高效率传输太赫兹信号。太赫兹行波管输能窗是典型的结构与功能一体化器件,主要起着行波管内外信号传递的作用,同时要保证器件内部的真空度以及对太赫兹波表现出高度“透明”。本文通过对近年来的文献进行总结整理,综述了国内外太赫兹行波管的应用和研究进展,揭示了未来发展大功率、高效率和宽频带传输是实现太赫兹真空器件实际应用的重点,这将对输能窗材料本身以及超精密加工提出了巨大挑战。纵观近几年国内外输能窗材料的发展历程,笔者们认为,与传统输能窗材料相比,单晶金刚石强度高,导热好,微波损耗小,没有晶界,气密性好,是最理想的太赫兹行波管输能窗口材料,也是目前研究发展的主流趋势。Terahertz(THz)wave that is located in the gap between electronics and photonics in the electromagnetic spectrum has unique properties different from low-frequency microwave and high-frequency optics,which has broad application prospects in military and civil fields such as wireless communication,biomedicine and public security.THz technology is a technique in which the generation and transmission of THz waves is emphasized.However,a dilemma of THz technology is to ensure the efficient transmission of terahertz signals without generating additional transmission losses.The energy transmission window is one of the kernel components of THz traveling wave tube(TWT).The energy transmission window is a typical device with integrated structure and function,which mainly plays the role of signal transmission inside and outside the traveling wave tube.Meanwhile,the energy transmission window is required to ensure the vacuum degree inside the device and show a high degree of‘transparency’to terahertz waves.In this paper,the application and research progress of THz TWT are reviewed by summarizing the literature in recent years.It can be revealed that the development of high power,high efficiency and wide band transmission is the focus of practical application of THz vacuum devices in the future,which will pose great challenges to the energy transmission window materials itself and ultra-precision machining.Throughout the development situation of energy transmission window materials in recent years,we can make a reasonable speculation that single crystal diamond is the most ideal energy transmission window material for THz traveling wave tubes,as single crystal diamond has the advantages of high strength,good thermal conductivity,low microwave loss,no grain boundary and good air tightness as compared with the traditional energy transmission window materials.Therefore,the application of high performance single crystal diamond materials should be the mainstream trend of research and development of transmission window materia

关 键 词：太赫兹 输能窗 金刚石 介电性能 

分 类 号：TN104.9[电子电信—物理电子学]