Title :
Photocathodes based on graphene nanoplatelet emitters on semi-insulating GaAs photoswitch
Author :
Yilmazoglu, Oktay ; Al-Daffaie, Shihab ; Kuppers, F. ; Hartnagel, H.L. ; Neo, Yoichiro ; Mimura, Hidenori
Author_Institution :
Tech. Univ. Darmstadt, Darmstadt, Germany
Abstract :
A simple photocathode based on graphene nanoplatelets glued on semi-insulating (s.i.) GaAs was fabricated and used for field electron emission in a diode configuration. The graphene nanoplatelets act as field emitter array with low turn-on field. The photomodulation was achieved with a GaAs photoswitch in series to the bottom of the graphene nanoplatelet emitters. The position and power of the laser illumination (800 nm) was not critical for photomodulation.
Keywords :
diodes; field emitter arrays; gallium arsenide; graphene; nanostructured materials; optical modulation; optical switches; photocathodes; semiconductor materials; GaAs; diode configuration; field electron emission; field emitter array; graphene nanoplatelet emitters; laser illumination; photocathodes; photomodulation; semiinsulating photoswitch; Cathodes; Gallium arsenide; Graphene; Indium phosphide; Indium tin oxide; Q measurement; field emitter; graphene; photocathode; semi-insulating GaAs;
Conference_Titel :
Vacuum Nanoelectronics Conference (IVNC), 2014 27th International
Conference_Location :
Engelberg
Print_ISBN :
978-1-4799-5306-6
DOI :
10.1109/IVNC.2014.6894740
