红外与毫米波学报2024，Vol.43Issue(4)：551-556,6.DOI:10.11972/j.issn.1001-9014.2024.04.015
光电导天线材料对辐射太赫兹波特性的模拟分析
Simulation analysis of radiation terahertz wave characteristics of photoconductive antenna materials
摘要
Abstract
The photoconductive antenna is a kind of widely used broadband terahertz(THz)radiation source in THz time-domain spectroscopy systems,and the substrate material of the antenna is crucial for the characteristics of generat-ed THz wave.The widely used photoconductive antenna material is the second-generation semiconductor of GaAs,while the third-generation semiconductor has a larger band gap,which is more advantageous for improving the power of THz wave from photoconductive antenna.In this work,the current surge model of large-aperture photoconductive an-tennas was used to simulate the characteristics of THz waves radiated by the photoconductive antenna made from com-monly used SI-GaAs and LT-GaAs,and the third-generation semiconductors(ZnSe,GaN,SiC)that are expected to be used in the future for photoconductive antennas.The results show that under the same bias electric field and their respec-tive highest pump laser flux,LT-GaAs antenna generates THz waves with the highest amplitude and widest frequency.The photoconductive antenna made by the third-generation semiconductor materials can withstand higher bias electric fields,and the intensity of radiated THz waves is much greater than that from GaAs antennas under their respective max-imum bias electrical fields.This work provides theoretical guidance for the development of new third-generation semi-conductor photoconductive antennas.关键词
太赫兹辐射/第三代半导体材料/电流瞬冲模型/光电导天线Key words
terahertz radiation/third-generation semiconductor materials/current surge model/photoconductive antenna分类
数理科学引用本文复制引用
侯磊,吴晓博,杨磊,施卫,杭玉桦..光电导天线材料对辐射太赫兹波特性的模拟分析[J].红外与毫米波学报,2024,43(4):551-556,6.基金项目
国家自然科学基金(62075179) （62075179）
陕西省教育厅基金重点项目(22JS026,22JS027) Supported by the National Natural Science Foundation of China(62075179)and the Natural Science Foundation of Shaanxi Provin-cial Department of Education(22JS026,22JS027) （22JS026,22JS027）
