Title :
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
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;
Conference_Titel :
Vacuum Nanoelectronics Conference (IVNC), 2014 27th International
Conference_Location :
Engelberg
Print_ISBN :
978-1-4799-5306-6
DOI :
10.1109/IVNC.2014.6894746
