中国物理B ›› 2014, Vol. 23 ›› Issue (3): 37901-037901.doi: 10.1088/1674-1056/23/3/037901

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Theoretical research on electron beam modulation in a field-emission cold cathode electron gun

李兴兴a, 袁学松a, 张宇b, 鄢扬a b   

  1. a School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China;
    b State Key Laboratory of Optoelectronic Materials and Technologies, and Guangdong Province Key Laboratory of Display Material and Technology, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China
  • 收稿日期:2013-07-24 修回日期:2013-09-13 出版日期:2014-03-15 发布日期:2014-03-15
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2013CB933603) and the National Natural Science Foundation of China (Grant Nos. U1134006 and 61101041).

Theoretical research on electron beam modulation in a field-emission cold cathode electron gun

Li Xing-Xing (李兴兴)a, Yuan Xue-Song (袁学松)a, Zhang Yu (张宇)b, Yan Yang (鄢扬)a b   

  1. a School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China;
    b State Key Laboratory of Optoelectronic Materials and Technologies, and Guangdong Province Key Laboratory of Display Material and Technology, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China
  • Received:2013-07-24 Revised:2013-09-13 Online:2014-03-15 Published:2014-03-15
  • Contact: Yuan Xue-Song E-mail:yuanxs@uestc.edu.cn
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2013CB933603) and the National Natural Science Foundation of China (Grant Nos. U1134006 and 61101041).

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摘要： In order to develop miniaturized and integrated electron vacuum devices, the electron beam modulation in a field-emission (FE) electron gun based on carbon nanotubes is researched. By feeding a high-frequency field between the cathode and the anode, the steady FE electron beam can be modulated in the electron gun. The optimal structure of the electron gun is discovered using 3D electromagnetism simulation software, and the FE electron gun is simulated by PIC simulation software. The results show that a broadband (74–114 GHz) modulation can be achieved by the electron gun with a rhombus channel, and the modulation amplitude of the beam current increases with the increases in the input power and the electrostatic field.

关键词: carbon nanotubes, cold cathode, field emission, electron gun

Abstract: In order to develop miniaturized and integrated electron vacuum devices, the electron beam modulation in a field-emission (FE) electron gun based on carbon nanotubes is researched. By feeding a high-frequency field between the cathode and the anode, the steady FE electron beam can be modulated in the electron gun. The optimal structure of the electron gun is discovered using 3D electromagnetism simulation software, and the FE electron gun is simulated by PIC simulation software. The results show that a broadband (74–114 GHz) modulation can be achieved by the electron gun with a rhombus channel, and the modulation amplitude of the beam current increases with the increases in the input power and the electrostatic field.

Key words: carbon nanotubes, cold cathode, field emission, electron gun

中图分类号:  (Field emission, ionization, evaporation, and desorption)

  • 79.70.+q
07.57.-c (Infrared, submillimeter wave, microwave and radiowave instruments and equipment) 41.85.-p (Beam optics)