Polarization anisotropy of individual core/shell GaAs/AlGaAs nanowires by photocurrent spectroscopy

Abstract

We investigate the photodetection properties of individual core/shell GaAs/AlGaAs nanowires (NWs) and, in particular, their behavior under linearly polarized light. The NWs are grown by Au-assisted metalorganic vapor phase epitaxy and electrical contacts are defined on NWs by electron beam induced deposition. The spectral photocurrent of the single NW is measured and the dependence of the polarization anisotropy (varying from about 0.1 to about 0.55) on the absorption wavelength is found to be clearly affected by the core/shell structure. High quantum efficiency values (10% at 600 nm) are obtained which are attractive for a wide range of optoelectronic devices.


Autore Pugliese

Tutti gli autori

  • A. Persano , B. Nabet , A. Taurino , P. Prete , N. Lovergine , A. Cola

Titolo volume/Rivista

APPLIED PHYSICS LETTERS


Anno di pubblicazione

2011

ISSN

0003-6951

ISBN

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Nessuna citazione

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Settori ERC

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Codici ASJC

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