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| Auteurs principaux: | , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2023
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2312.03228 |
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| _version_ | 1866914691397189632 |
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| author | Shcherbakov, Dmitry Voigt, Greyson Memaran, Shahriar Liu, Gui-Bin Wang, Qiyue Watanabe, Kenji Taniguchi, Takashi Smirnov, Dmitry Balicas, Luis Zhang, Fan Lau, Chun Ning |
| author_facet | Shcherbakov, Dmitry Voigt, Greyson Memaran, Shahriar Liu, Gui-Bin Wang, Qiyue Watanabe, Kenji Taniguchi, Takashi Smirnov, Dmitry Balicas, Luis Zhang, Fan Lau, Chun Ning |
| contents | A two-dimensional (2D) quantum electron system is characterized by the quantized energy levels, or subbands, in the out-of-plane direction. Populating higher subbands and controlling the inter-subband transitions have wide technological applications such as optical modulators and quantum cascade lasers. In conventional materials, however, the tunability of intersubband spacing is limited. Here we demonstrate electrostatic population and characterization of the second subband in few-layer InSe quantum wells, with giant tunability of its energy, population, and spin-orbit coupling strength, via the control of not only layer thickness but also out-of-plane displacement field. A modulation of as much as 350% or over 250 meV is achievable, underscoring the promise of InSe for tunable infrared and THz sources, detectors and modulators. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_03228 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Giant Tunability of Intersubband Transitions and Quantum Hall Quartets in Few-Layer InSe Quantum Wells Shcherbakov, Dmitry Voigt, Greyson Memaran, Shahriar Liu, Gui-Bin Wang, Qiyue Watanabe, Kenji Taniguchi, Takashi Smirnov, Dmitry Balicas, Luis Zhang, Fan Lau, Chun Ning Mesoscale and Nanoscale Physics A two-dimensional (2D) quantum electron system is characterized by the quantized energy levels, or subbands, in the out-of-plane direction. Populating higher subbands and controlling the inter-subband transitions have wide technological applications such as optical modulators and quantum cascade lasers. In conventional materials, however, the tunability of intersubband spacing is limited. Here we demonstrate electrostatic population and characterization of the second subband in few-layer InSe quantum wells, with giant tunability of its energy, population, and spin-orbit coupling strength, via the control of not only layer thickness but also out-of-plane displacement field. A modulation of as much as 350% or over 250 meV is achievable, underscoring the promise of InSe for tunable infrared and THz sources, detectors and modulators. |
| title | Giant Tunability of Intersubband Transitions and Quantum Hall Quartets in Few-Layer InSe Quantum Wells |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2312.03228 |