Journal article
Resolving the Band Alignment of InAs/InAsSb Mid-Wave-Infrared Type-II Superlattices
Advanced optical materials
2026
DOI: 10.1002/adom.71320
Abstract
In this work, three InAs/InAs0.65 Sb0.35 superlattices with different periods were investigated using photoluminescence and photoreflectance measurements, and their band structure was simulated using a 14 bulk-band k⋅p model. The structures were studied by analysing the evolution of the spectral features in temperature and excitation power to determine the origin of optical transitions. After identifying which of these are related to the superlattice mini-bands, a rich collection of observed higher-order optical transitions was compared with refractive-index calculations. This procedure was used to adjust the parameters of the theoretical model, namely the bowing parameters of the InAsSb valence band offset and bandgap. It was also shown that the spectroscopy of the higher-order states combined with numerical modelling of the refractive index is a powerful tool for improvement of the material parameters, presenting a new approach to material studies of advanced semiconductor heterostructures.
Details
- Title: Subtitle
- Resolving the Band Alignment of InAs/InAsSb Mid-Wave-Infrared Type-II Superlattices
- Creators
- Michał Rygała - Wrocław University of Science and TechnologyJulian Zanon - Eindhoven University of TechnologyAndreas Bader - University of WürzburgTristan Smołka - Wrocław University of Science and TechnologyFabian Hartmann - University of WürzburgSven Höfling - University of WürzburgMichael E. Flatté - University of IowaMarcin Motyka - Wrocław University of Science and Technology
- Resource Type
- Journal article
- Publication Details
- Advanced optical materials
- DOI
- 10.1002/adom.71320
- ISSN
- 2195-1071
- eISSN
- 2195-1071
- Publisher
- Wiley
- Grant note
- Bundesministerium für Forschung, Technologie und Raumfahrt (http://data.elsevier.com/vocabulary/SciValFunders/501100002347) 13N16964; 956548 / BMFTR
- Language
- English
- Electronic publication date
- 2026
- Academic Unit
- Electrical and Computer Engineering; Physics and Astronomy
- Record Identifier
- 9985174608802771
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