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Interface influence on structural properties of InAs/GaSb type-II superlattices

Author(s): Justyna Kubacka-Traczyk | Iwona Sankowska | Janusz Kaniewski

Journal: Optica Applicata
ISSN 0078-5466

Volume: 39;
Issue: 4;
Start page: 875;
Date: 2009;
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Keywords: interface | II type superlattice | InAs/GaSb

Theoretical studies of interface impact on structural properties of InAs/GaSb type-II superlattices were carried out. Multilayer structures used for mid-infrared detection were considered. The superlattices examined consisted of 190 pairs of 9 monolayers (MLs) of InAs and 10 MLs of GaSb. Both types of interfaces, i.e., “GaAs-like” as well as “InSb-like”, were analyzed. The simulations were performed using dynamical theory of diffraction for different thicknesses of interface layers. The lattice mismatch was extracted from X-ray diffraction profiles. The analysis performed shows that the strain-balanced InAs/GaSb superlattice can be optimized by using thin InSb-like or GaAs-like interface layers simultaneously.
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Tango Jona
Tangokurs Rapperswil-Jona