Suppressed phase separation in thick GaInAsSb layers across the compositional range grown by molecular beam epitaxy for 1.7–4.9 μm infrared materials

Yildirim, Asli; Prineas, John P.

doi:doi:10.1116/1.3668088

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Journal of Vacuum Science & Technology B / Volume 30 / Issue 2 / 28th North American Molecular Beam Epitaxy Conference

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J. Vac. Sci. Technol. B 30, 02B104 (2012); http://dx.doi.org/10.1116/1.3668088 (7 pages)

Suppressed phase separation in thick GaInAsSb layers across the compositional range grown by molecular beam epitaxy for 1.7–4.9 μm infrared materials

Asli Yildirim and John P. Prineas

Department of Physics and Astronomy, and Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242

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(Published online 13 December 2011)

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Thick 2 um Ga_1-xIn_xAs_ySb_1-y layers lattice-matched to (100)-GaSb were grown by molecular beam epitaxy across the compositional range x = 0 to 1. By lowering the growth temperature to the 410 – 450 C range, phase separation was suppressed throughout the miscibility gap, as evidenced in measurements such as photoluminescence, high-resolution x-ray diffraction, atomic force microscopy, and cross-sectional transmission electron microscopy. Bright photoluminescence was recorded in the sample series ranging from 1.7 to 4.9 ums.

ACKNOWLEDGMENT

The authors gratefully acknowledge funding for this research by the National Science Foundation under Grant No. DMR 100-6956 .

Article Outline

INTRODUCTION
METHODS
RESULTS
DISCUSSION
SUMMARY

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KEYWORDS and PACS

Keywords

atomic force microscopy, gallium arsenide, gallium compounds, III-V semiconductors, indium compounds, molecular beam epitaxial growth, phase separation, photoluminescence, semiconductor growth, transmission electron microscopy, X-ray diffraction

PACS

81.05.Ea

III-V semiconductors
64.75.Qr

Phase separation and segregation in semiconductors
78.55.Cr

III-V semiconductors
81.15.Hi

Molecular, atomic, ion, and chemical beam epitaxy

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History

Received 21 September 2011
Accepted 20 November 2011
Published online 13 December 2011

Digital Object Identifier

http://dx.doi.org/10.1116/1.3668088

PUBLICATION DATA

ISSN

1071-1023 (print)

1520-8567 (online)

Publisher

American Vacuum Society

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