High gain single GaAs nanowire photodetector
Author:
- 26 August 2013
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 103 (9) , 093101
Abstract
An undoped single GaAs nanowire (NW) photodetector based on a metal–semiconductor–metal Schottky diode structure is fabricated by a focused ion beam method. The photoconductive gain of the device reaches 20 000 at low laser excitation. Bias-dependence of gain proves that the surface contributes more to the gain at higher bias because of an increased surface charge region. The spectral response demonstrates not only the band-edge absorption profile of the single GaAs NW, but also the existence of leaky-mode resonance.Keywords
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