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InSb quantum dots for the mid-infrared spectral range grown on GaAs substrates using metamorphic InAs buffer layers

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Lu, Q., Zhuang, Q., Marshall, A. (Andrea)‏, Kesaria, M., Beanland, R. and Krier, A. (2014) InSb quantum dots for the mid-infrared spectral range grown on GaAs substrates using metamorphic InAs buffer layers. Semiconductor Science and Technology, Volume 29 (Number 7). 075011. doi:10.1088/0268-1242/29/7/075011

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Official URL: http://dx.doi.org/10.1088/0268-1242/29/7/075011

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Abstract

Type II InSb/InAs quantum dots (QDs) were successfully grown on GaAs substrates using three different metamorphic buffer layer (MBL) designs. The structural properties of the resulting metamorphic InAs buffer layers were studied and compared using cross-sectional transmission electron microscopy and high resolution x-ray diffraction measurements. Photoluminescence (PL) originating from the InSb QDs was observed from each of the samples and was found to be comparable to the PL of InSb QDs grown onto homo-epitaxially deposited InAs. The 4 K PL intensity and linewidth of InSb QDs grown onto a 3 µm thick InAs buffer layer directly deposited onto GaAs proved to be superior to that from QDs grown onto an InAs MBL using either AlSb or GaSb interlayers. Light-emitting diode structures containing ten layers of InSb QD in the active region were subsequently fabricated and electroluminescence from the QDs was obtained in the mid-infrared spectral range up to 180 K. This is the first step towards obtaining mid-infrared InSb QD light sources on GaAs substrates.

Item Type: Journal Article
Divisions: Faculty of Science > Physics
Journal or Publication Title: Semiconductor Science and Technology
Publisher: Institute of Physics Publishing Ltd.
ISSN: 0268-1242
Official Date: July 2014
Dates:
DateEvent
July 2014Published
12 May 2014Available
8 April 2014Accepted
Volume: Volume 29
Number: Number 7
Article Number: 075011
DOI: 10.1088/0268-1242/29/7/075011
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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