Stabilization of laser-induced thermionic electron emission from carbon nanotubes through rapid power switching

Author

Chang, Mingchao ; Moghaddam, M. Vahdani ; Nojeh, Alireza

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada

fYear

2014

fDate

6-10 July 2014

Firstpage

34

Lastpage

35

Abstract

The electron emission stability of a carbon nanotube-based optically-activated cathode is investigated. The emission mechanism is thermionic, based on localized light-induced heating of the carbon nanotube forest - the Heat Trap effect. We demonstrate stabilized emission behavior by introducing a switching phase in the input optical power. This effectively eliminates or significantly reduces the decay in emission current with time.

Keywords

carbon nanotubes; heating; thermionic electron emission; C; carbon nanotubes; emission current; emission mechanism; heat trap effect; input optical power; laser-induced thermionic electron emission stability; localized light-induced heating; optically-activated cathode; rapid power switching; Carbon dioxide; Cathodes; Heating; Lead; electron source; light-induced thermionic; photocathodes; thermoinic emission; vertically-aligned carbon nanotube forests;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Nanoelectronics Conference (IVNC), 2014 27th International

Conference_Location

Engelberg

Print_ISBN

978-1-4799-5306-6

Type

conf

DOI

10.1109/IVNC.2014.6894746

Filename

6894746