Bright dipolar excitons in twisted black phosphorus homostructures
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866912103512670208 |
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| author | Huang, Shenyang Yu, Boyang Ma, Yixuan Pan, Chenghao Ma, Junwei Zhou, Yuxuan Ma, Yaozhenghang Yang, Ke Wu, Hua Lei, Yuchen Xing, Qiaoxia Mu, Lei Zhang, Jiasheng Mou, Yanlin Yan, Hugen |
| author_facet | Huang, Shenyang Yu, Boyang Ma, Yixuan Pan, Chenghao Ma, Junwei Zhou, Yuxuan Ma, Yaozhenghang Yang, Ke Wu, Hua Lei, Yuchen Xing, Qiaoxia Mu, Lei Zhang, Jiasheng Mou, Yanlin Yan, Hugen |
| contents | Bright dipolar excitons, which contain electrical dipoles and have high oscillator strength, are an ideal platform for studying correlated quantum phenomena. They usually rely on carrier tunneling between two quantum wells or two layers to hybridize with nondipolar excitons to gain oscillator strength. In this work, we uncovered a new type of bright infrared dipolar exciton by stacking 90°-twisted black phosphorus (BP) structures. These excitons, inherent to the reconstructed band structure, exhibit high oscillator strength. Most importantly, they inherit the linear polarization from BP, which allows light polarization to be used to select the dipole direction. Moreover, the dipole moment and resonance energy can be widely tuned by the thickness of the BP. Our results demonstrate a useful platform for exploring tunable correlated dipolar excitons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_01905 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Bright dipolar excitons in twisted black phosphorus homostructures Huang, Shenyang Yu, Boyang Ma, Yixuan Pan, Chenghao Ma, Junwei Zhou, Yuxuan Ma, Yaozhenghang Yang, Ke Wu, Hua Lei, Yuchen Xing, Qiaoxia Mu, Lei Zhang, Jiasheng Mou, Yanlin Yan, Hugen Mesoscale and Nanoscale Physics Materials Science Bright dipolar excitons, which contain electrical dipoles and have high oscillator strength, are an ideal platform for studying correlated quantum phenomena. They usually rely on carrier tunneling between two quantum wells or two layers to hybridize with nondipolar excitons to gain oscillator strength. In this work, we uncovered a new type of bright infrared dipolar exciton by stacking 90°-twisted black phosphorus (BP) structures. These excitons, inherent to the reconstructed band structure, exhibit high oscillator strength. Most importantly, they inherit the linear polarization from BP, which allows light polarization to be used to select the dipole direction. Moreover, the dipole moment and resonance energy can be widely tuned by the thickness of the BP. Our results demonstrate a useful platform for exploring tunable correlated dipolar excitons. |
| title | Bright dipolar excitons in twisted black phosphorus homostructures |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2411.01905 |