Anomalous photoconductive behavior of a single InAs nanowire photodetector

Journal Article · Mon Dec 28 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4938752· OSTI ID:22486315

Li, Junshuai; Yan, Xin; Sun, Fukuan; Zhang, Xia; Ren, Xiaomin ^[1]

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1. State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876 (China)

We report on a bare InAs nanowire photodetector which exhibits an anomalous photoconductive behavior. Under low-power illumination, the current is smaller than the dark current, and monotonously decreases as the excitation power increases. When the excitation power is high enough, the current starts to increase normally. The phenomenon is attributed to different electron mobilities in the “core” and “shell” of a relatively thick nanowire originating from the surface effect, which result in a quickly dropped “core current” and slowly increased “shell current” under illumination.

• OSTI ID: 22486315
• Journal Information: Applied Physics Letters, Vol. 107, Issue 26; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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GENERAL PHYSICS
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