Journal article
Triple V-shaped type-II quantum wells for long wavelength interband cascade lasers
Physics letters. A, Vol.561, 130971
11/2025
DOI: 10.1016/j.physleta.2025.130971
Abstract
We investigate triple V-shaped type-II quantum wells designed to emit at 6–9 μm wavelength range, consisting of three InAs(Sb) electron quantum wells and two Ga0.6 In0.4 Sb hole quantum wells. The wells’ composition and thicknesses are optimized in terms of wavefunction overlap and valence intersubband absorption (VISA) by using k⋅p calculation. The triple V-shaped type-II quantum well designed for emission at 6.2 μm, 7.5 μm, and 9.0 μm, shows 18.8 %, 18.9 % and 19.2 % higher wavefunction overlap, respectively, compared to the corresponding W-shaped designs of InAs/Ga0.6 In0.4 Sb/InAs wells commonly employed in active regions of interband cascade lasers. In addition, the calculated VISA in V-shaped quantum wells for the designed wavelength is significantly smaller than in W-shaped wells. These enhancements might extend the wavelength limit of room temperature emission of GaSb-based interband cascade lasers.
Details
- Title: Subtitle
- Triple V-shaped type-II quantum wells for long wavelength interband cascade lasers
- Creators
- B PetrovićT SatoS BirnerJ ZanonM.E. FlattéR WeihF HartmannS Höfling
- Resource Type
- Journal article
- Publication Details
- Physics letters. A, Vol.561, 130971
- DOI
- 10.1016/j.physleta.2025.130971
- ISSN
- 0375-9601
- eISSN
- 1873-2429
- Publisher
- ELSEVIER; AMSTERDAM
- Grant note
- European Union: 956548
We are grateful to European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement (no 956548, QUANTIMONY) for financial support.
- Language
- English
- Date published
- 11/2025
- Academic Unit
- Electrical and Computer Engineering; Physics and Astronomy
- Record Identifier
- 9984964234302771
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