Field emission electron source for terahertz source application

被引：1
|
作者：
机构：
[1] School of Physical Science and Technology, Nanjing Normal University
[2] School of Electronic Science and Engineering, Southeast University
[3] Department of Basic Courses, Nanjing Institute of Technology
来源：
Di, Y. (diyunsong@yahoo.com.cn) | 1600年 / Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China卷 / 25期
关键词：
Current density; Electron beam; Field emission; Terahertz source;
D O I：
10.3788/HPLPB20132506.1494
中图分类号：
学科分类号：
摘要：
Field emission from carbon nanotube (CNT) has been simulated by a particle-in-cell (PIC) software at pico-second level. The emission current, current density and focus character of a CNT cathode have been discussed. In a diode configuration, the emission current from cathode reaches 1.85 A/cm2 when the anode voltage is 2 kV. While in a triode configuration, the current reaches 2.3 A/cm2 for a gate voltage of 700 V, and the focus performance of electron beam can be optimized by modifying triode parameters and voltage applied to the electrodes. A diode structure with CNT cathode has been fabricated to verify large-current field emission, a total emission current of 52.1 mA and a current density of 6.6 A/cm2 have been obtained from this diode. It proved that field emission cathode can be applied in terahertz source devices.
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页码：1494 / 1498
页数：4
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