基于光子晶体慢波结构的太赫兹返波管研究  

Research on Terahertz Backward-Wave Oscillator Based on Photonic Column Array Slow-Wave Structure

作　　者：肖川红 吴振华[1] 李杰龙 史宗君[1] 钟任斌[1] 刘頔威[1] 赵陶[1,2] 胡旻[1] 刘盛纲[1] XIAO Chuanhong;WU Zhenhua;LI Jielong;SHI Zongjun;ZHONG Renbin;LIU Diwei;ZHAO Tao;HU Min;LIU Shenggang(School of Electronic Science and Engineering,University of Electronic Science and Technology of China Chengdu 611731;Higher Research Institute(Shenzhen)of University of Electronic Science and Technology of China Shenzhen Guangdong 518110)

机构地区：[1]电子科技大学电子科学与工程学院,成都611731 [2]电子科技大学(深圳)高等研究院,广东深圳518110

出　　处：《电子科技大学学报》2022年第5期702-708,共7页Journal of University of Electronic Science and Technology of China

基　　金：Supported by National Natural Science Foundation of China(61701084,61505022);National Key Research and Development Program of China(2018YFF01013001,2017YFA0701000)。

摘　　要：研究了一种光子晶体的慢波结构,通过对该结构的色散、场分布和粒子模拟计算,设计和仿真了一个0.28-THz的带状注返波管。在阴极电流密度仅10 A/cm^(2)(最小可低于6 A/cm^(2)),电压12.5 kV,磁场0.5 T的情况下,该结构通过与带状电子注浸没式互作用,输出功率为435 mW。在此基础上,采用了LIGA加工技术制备了该慢波结构。研究表明,光子晶体结构能有效提高互作用效率和降低起振电流密度,有效提高太赫兹真空电子器件阴极的使用寿命,是提高太赫兹真空辐射源性能的一种有效途径。This article explores a photonic column array slow-wave structure(SWS).A 0.28-THz sheet beam backward-wave oscillator(BWO)was designed and simulated by calculating the dispersion,field distribution and particle simulation.When the cathode current density is only 10 A/cm^(2)(the minimum is less than 6 A/cm^(2)),the voltage is 12.5 kV and the magnetic field is 0.5 T,the structure interacts with the sheet beam by immersion and the output power is 435 m W.On the basis of previous work,the SWS was fabricated using LithographyGalvanoformung-Abformung(LIGA)fabrication technology.The results show that the column array structure can effectively improve the interaction efficiency and reduce the starting current density;and effectively improve the lifespan of terahertz(THz)vacuum electron device(VED)cathodes,which is a viable means of increasing the performance of THz vacuum radiation sources.

关 键 词：光子晶体慢波结构 太赫兹返波管 起振电流 真空电子器件 

分 类 号：TN12[电子电信—物理电子学] O46[理学—电子物理学]