Roles of band gap and Kane electronic dispersion in the THz-frequency nonlinear optical response in HgCdTe
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arXiv
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| Autores principales: | , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866909303858790400 |
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| author | Soranzio, Davide Abreu, Elsa Houver, Sarah Dössegger, Janine Savoini, Matteo Teppe, Frédéric Krishtopenko, Sergey Mikhailov, Nikolay N. Dvoretsky, Sergey A. Johnson, Steven L. |
| author_facet | Soranzio, Davide Abreu, Elsa Houver, Sarah Dössegger, Janine Savoini, Matteo Teppe, Frédéric Krishtopenko, Sergey Mikhailov, Nikolay N. Dvoretsky, Sergey A. Johnson, Steven L. |
| contents | Materials with linear electronic dispersion often feature high carrier mobilities and unusually strong nonlinear optical interactions. In this work, we investigate the THz nonlinear dynamics of one such material, HgCdTe, with an electronic band dispersion heavily dependent on both temperature and stoichiometry. We show how the band gap, carrier concentration and band shape together determine the nonlinear response of the system. At low temperatures, carrier generation from Zener tunneling dominates the nonlinear response with a reduction in the overall transmission. At room temperature, quasi-ballistic electronic dynamics drive the largest observed nonlinear optical interactions, leading to a transmission increase. Our results demonstrate the sensitivity of these nonlinear optical properties of narrow-gap materials to small changes in the electronic dispersion and carrier concentration. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_10582 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Roles of band gap and Kane electronic dispersion in the THz-frequency nonlinear optical response in HgCdTe Soranzio, Davide Abreu, Elsa Houver, Sarah Dössegger, Janine Savoini, Matteo Teppe, Frédéric Krishtopenko, Sergey Mikhailov, Nikolay N. Dvoretsky, Sergey A. Johnson, Steven L. Materials Science Materials with linear electronic dispersion often feature high carrier mobilities and unusually strong nonlinear optical interactions. In this work, we investigate the THz nonlinear dynamics of one such material, HgCdTe, with an electronic band dispersion heavily dependent on both temperature and stoichiometry. We show how the band gap, carrier concentration and band shape together determine the nonlinear response of the system. At low temperatures, carrier generation from Zener tunneling dominates the nonlinear response with a reduction in the overall transmission. At room temperature, quasi-ballistic electronic dynamics drive the largest observed nonlinear optical interactions, leading to a transmission increase. Our results demonstrate the sensitivity of these nonlinear optical properties of narrow-gap materials to small changes in the electronic dispersion and carrier concentration. |
| title | Roles of band gap and Kane electronic dispersion in the THz-frequency nonlinear optical response in HgCdTe |
| topic | Materials Science |
| url | https://arxiv.org/abs/2404.10582 |