真空电子技术Issue(6)：13-19,7.DOI:10.16540/j.cnki.cn11-2485/tn.2025.06.03
基于矩形波导阵列输出结构的光电协同激励冷阴极太赫兹辐射源器件
A Photo-Electric Synergistically Excited Cold Cathode THz Radiation Source Based on Rectangular Waveguide Array Output Structure
摘要
Abstract
Terahertz(THz)radiation sources hold significant application potential in high-bandwidth wireless communication,high-resolution radar imaging,and biomedical detection.A new THz radiation source scheme based on rectangular waveguide array output structure using photo-electric synergistically excited cold-cathode is proposed.It generates high-frequency electromagnetic wave outputs above 0.6 THz with the help of ultrafast and ultrashort pulsed laser excitation,so that the electron emission from the cold cathode carries high-frequency signals directly without the need for a complex electron beam modulation component and an additional microwave feed-in source.A device structure that can generate 0.6 THz electromagnetic wave output is developed and designed by CST software,along with the corresponding output waveguide array.The simulation results demonstrate that under the synergistic excitation of femtosecond laser pulses(wavelength 800 nm,pulse duration 200 fs,repetition rate 1 kHz)and an anode-cathode voltage of 1000 V,the nano cold cathode achieves an average emission current of 1 nA with initial electron kinetic energy of 2000 eV.The radiation source achieves an electromagnetic wave output with a peak power of 13 nW and a center frequency of 607 GHz.关键词
太赫兹波/冷阴极/辐射源/光电协同激励/矩形波导阵列Key words
Terahertz wave/Cold cathode/Radiation source/Photo-electric synergistical excitation/Rectangu-lar waveguide array分类
信息技术与安全科学引用本文复制引用
HAN Dong,SHEN Yan,SONG Zhe-yu,XU Peng-bin,ZHANG Yu,CHEN Huan-jun,XU Ning-sheng,DENG Shao-zhi..基于矩形波导阵列输出结构的光电协同激励冷阴极太赫兹辐射源器件[J].真空电子技术,2025,(6):13-19,7.基金项目
国家重点研发计划课题(2024YFA1208503),国家自然科学基金(62471498),广东省基础与应用基础研究基金(2025A1515010637),广东省科技计划项目(2023B1212060025) （2024YFA1208503）
