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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 ISSN 0268-1242.
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Official URL: http://dx.doi.org/10.1088/0268-1242/29/7/075011
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, Engineering and Medicine > Science > Physics | ||||||||
| Journal or Publication Title: | Semiconductor Science and Technology | ||||||||
| Publisher: | Institute of Physics Publishing Ltd. | ||||||||
| ISSN: | 0268-1242 | ||||||||
| Official Date: | July 2014 | ||||||||
| Dates: |
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| 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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