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Distinguishing cap and core contributions to the photoconductive terahertz response of single GaAs based core–shell–cap nanowire detectors

Peng, Kun; Parkinson, Patrick; Fu, Lan; Gao, Qian; Boland, Jessica L.; Guo, Yanan; Jiang, Nian; Tan, Hark Hoe; Johnston, Michael B; Jagadish, Chennupati


GaAs nanowires are promising candidates for advanced optoelectronic devices, despite their high surface recombination velocity and large surface-area-to-volume ratio, which renders them problematic for applications that require efficient charge collection and long charge-carrier lifetimes. Overcoating a bare GaAs nanowire core with an optimized larger-bandgap AlGaAs shell, followed by a capping layer of GaAs to prevent oxidation, has proven an effective way to passivate the nanowire surface and...[Show more]

CollectionsANU Research Publications
Date published: 2018-03-28
Type: Journal article
Source: Lithuanian Journal of Physics
DOI: 10.3952/physics.v58i1.3648
Access Rights: Open Access


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