Multisubband Plasmons in InAs/GaSb Broken Gap Quantum Well
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arXiv
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| Format: | Preprint |
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2025
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| author | Pasek, Wojciech Julian Hajji, Soufiane Tata, Oussama Cerutti, Laurent Flores, Fernando Gonzalez-posada Hurand, Simon Fatimy, Abdelouahed El Taliercio, Thierry |
| author_facet | Pasek, Wojciech Julian Hajji, Soufiane Tata, Oussama Cerutti, Laurent Flores, Fernando Gonzalez-posada Hurand, Simon Fatimy, Abdelouahed El Taliercio, Thierry |
| contents | Multi-subband plasmon (MSP) modes in heavily doped InAs/GaSb broken-gap quantum wells grown via molecular beam epitaxy (MBE) are investigated. An $8$-band $\vec{k} \cdot \vec{p}$ semiclassical model accurately predicts ellipsometric spectra, reflecting strong subband hybridization and non-parabolicity. In contrast, single-band plasmon models show qualitative discrepancies with experiment, even with adjusted effective masses. These findings highlight the potential of broken-gap wells for quantum technologies leveraging interband coupling and wavefunction hybridization. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_14491 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Multisubband Plasmons in InAs/GaSb Broken Gap Quantum Well Pasek, Wojciech Julian Hajji, Soufiane Tata, Oussama Cerutti, Laurent Flores, Fernando Gonzalez-posada Hurand, Simon Fatimy, Abdelouahed El Taliercio, Thierry Mesoscale and Nanoscale Physics Multi-subband plasmon (MSP) modes in heavily doped InAs/GaSb broken-gap quantum wells grown via molecular beam epitaxy (MBE) are investigated. An $8$-band $\vec{k} \cdot \vec{p}$ semiclassical model accurately predicts ellipsometric spectra, reflecting strong subband hybridization and non-parabolicity. In contrast, single-band plasmon models show qualitative discrepancies with experiment, even with adjusted effective masses. These findings highlight the potential of broken-gap wells for quantum technologies leveraging interband coupling and wavefunction hybridization. |
| title | Multisubband Plasmons in InAs/GaSb Broken Gap Quantum Well |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2506.14491 |