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太赫兹源场致发射电子源

Field emission electron source for terahertz source application

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【Author】 Di Yunsong1,2,Zhang Xiaobing2,Lei Wei2,Zhang Lifang2,Cui Yunkang2,3,Wang Qilong2,Chen Jing2(1.School of Physical Science and Technology,Nanjing Normal University,Nanjing 210097,China; 2.School of Electronic Science and Engineering,Southeast University,Nanjing 210096,China; 3.Department of Basic Courses,Nanjing Institute of Technology,Nanjing 211167,China)

【机构】南京师范大学物理科学与技术学院；东南大学电子科学与工程学院；南京工程学院基础部；

【摘要】通过粒子模拟(PIC)软件模拟计算了在ps级别下二极与三极结构碳纳米管场致发射的电流密度与电子注聚焦性能。阳极电压在2kV时,二极结构下电流密度达到1.85A/cm2;三极结构下,栅压700V时发射电流密度达到2.3A/cm2,且在一定的三极结构参数与电极电压下,可以获得较好的电子注聚束效果。通过碳纳米管二极管发射实验,获得了6.6A/cm2的发射电流密度,总发射电流达到52.1mA,可以为太赫兹器件提供连续发射的电子注。更多还原

【Abstract】 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.更多还原

【关键词】场致发射；电子束；太赫兹源；电流密度；
【Key words】 field emission； electron beam； terahertz source； current density；

【基金】国家自然科学基金项目(51120125001,60971017,61101023);江苏省高校自然科学基础研究项目(12KJB510004);南京工程学院创新基金项目(CKJ2010013)

【文献出处】强激光与粒子束 ,High Power Laser and Particle Beams , 编辑部邮箱 ,2013年06期

【分类号】O462.4
【被引频次】10
【下载频次】166

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