Parametrically Optimized Carbon Nanotube-Coated Cold Cathode Spindt Arrays.
Here, we investigate, through parametrically optimized macroscale simulations, the field electron emission from arrays of carbon nanotube (CNT)-coated Spindts towards the development of an emerging class of novel vacuum electron devices. The present study builds on empirical data gleaned from our recent experimental findings on the room temperature electron emission from large area CNT electron sources. We determine the field emission current of the present microstructures directly using particle in cell (PIC) software and present a new CNT cold cathode array variant which has been geometrically optimized to provide maximal emission current density, with current densities of up to 11.5 A/cm² at low operational electric fields of 5.0 V/μm.
School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China. yuanxs@uestc.edu.cn.
Xuesong
X
Yuan
Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge CB3 0FA, UK. mtc35@cam.ac.uk.
Matthew T
MT
Cole
State Key Laboratory Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou 510275, China. stszhyu@mail.sysu.edu.cn.
Yu
Y
Zhang
School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China. jqwu@uestc.edu.cn.
Jianqiang
J
Wu
Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge CB3 0FA, UK. wim@eng.cam.ac.uk.
William I
WI
Milne
School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China. yanyang@uestc.edu.cn.
Yang
Y
Yan
carbon nanotube; cold cathode; electron gun; field emission