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Quantum Ring Infrared Photodetector Based On Droplet Epitaxy Technique

Published online by Cambridge University Press:  31 January 2011

Dali Shao ,
Jiang Wu ,
Zhenghua Li ,
Omar Manasreh ,
Vasyl P Kunets ,
Zhiming M Wang  and
Gregory J. Salamo
Dali Shao
Affiliation:
[email protected], University of Arkansas, Electrical Engineering, Fayetteville, Arkansas, United States
Jiang Wu
Affiliation:
[email protected], University of Arkansas, Electrical Engineering, Fayetteville, Arkansas, United States
Zhenghua Li
Affiliation:
[email protected], University of Arkansas, Institue of Nanoscale Science and Engineering, Fayetteville, Arkansas, United States
Omar Manasreh
Affiliation:
[email protected], United States
Vasyl P Kunets
Affiliation:
[email protected], University of Arkansas, Institue of Nanoscale Science and Engineering, Fayetteville, Arkansas, United States
Zhiming M Wang
Affiliation:
[email protected], University of Arkansas, Institute of Nanoscale Science and Engineering, Fayetteville, Arkansas, United States
Gregory J. Salamo
Affiliation:
[email protected], United States
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Abstract

In this work, we design and fabricate a GaAs quantum ring infrared photodetector. The lattice matched GaAs/Al0.3Ga0.7As quantum rings are grown by using molecular beam epitaxy technique. The morphology of the quantum rings are characterized by an atomic force microscopy. Normal incident configured photodetectors are fabricated by standard photolithography. The photoresponse spectra are measured by a Fourier transform infrared spectrometer and exhibit two broad bands in visible-near-infrared and mid-infrared spectral range. Using quantum rings as absorption medium, we observed visible-near-infrared response at a temperature as high as 300 K while mid-infrared response up to 140 K.

Keywords

infrared (IR) spectroscopymorphologyphotovoltaic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1208: Symposium O – Excitons and Plasmon Resonances in Nanostructures II , 2009 , 1208-O09-24
Copyright
Copyright © Materials Research Society 2010

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