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Browse Journals & Magazines > Journal of Applied Physics ...> Volume:98 Issue:6 Help

Interfaces in GaxIn1-xAsySb1-y/AlxGa1-xAsySb1-y multi-quantum-well heterostructures probed by transmittance anisotropy spectroscopy

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7 Author(s)
Cerda-Mendez, E.A. ; Instituto de Investigación en Comunicación Óptica, Universidad Autónoma de San Luis Potosí, 78000 San Luis Potosí, México ; Balderas-Navarro, R.E. ; Lastras-Martinez, A. ; Lastras-Martinez, L.F.
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We have used transmission anisotropy (TA) and photoreflectance-difference (PRD) spectroscopies as tools for the characterization of heterostructures consisting of 100 Å GaxIn1-xAsySb1-y quantum wells with 200 Å AlxGa1-xAsySb1-y barriers. Exctions associated to two allowed and two forbidden transitions of the confined levels in the quantum wells (QWs) are detected with PRD at 15 K. Using TA spectroscopy they all can be clearly resolved at room temperature. The signal of the anisotropy is proved experimentally to stem exclusively from the QWs and the surrounding interfaces. We show TA spectroscopy to be a powerful tool for interface characterization in heterostructures with energy gap below that of the substrate.

Published in:
Journal of Applied Physics  (Volume:98 ,  Issue: 6 )

Date of Publication: Sep 2005

Page(s):
066107 - 066107-3
ISSN :
0021-8979
Digital Object Identifier :
10.1063/1.2058214
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Sep 2005

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