An active metasurface enhanced with moiré ferroelectricity
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arXiv
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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866911992283922432 |
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| author | Kim, Dong Seob Xiao, Chengxin Dominguez, Roy C. Liu, Zhida Abudayyeh, Hamza Lee, Kyoungpyo Mayorga-Luna, Rigo Kim, Hyunsue Watanabe, Kenji Taniguchi, Takashi Shih, Chih-Kang Miyahara, Yoichi Yao, Wang Li, Xiaoqin |
| author_facet | Kim, Dong Seob Xiao, Chengxin Dominguez, Roy C. Liu, Zhida Abudayyeh, Hamza Lee, Kyoungpyo Mayorga-Luna, Rigo Kim, Hyunsue Watanabe, Kenji Taniguchi, Takashi Shih, Chih-Kang Miyahara, Yoichi Yao, Wang Li, Xiaoqin |
| contents | Semiconductor moiré systems, characterized by their periodic spatial light emission, unveil a new paradigm of active metasurfaces. Here, we show that ferroelectric moiré domains formed in a twisted hexagonal boron nitride (t-hBN) substrate can modulate light emission from an adjacent semiconductor MoSe$_2$ monolayer, enhancing its functionality as an active metasurface. The electrostatic potential at the surface of the t-hBN substrate provides a simple way to confine excitons in the MoSe$_2$ monolayer. The excitons confined within the domains and at the domain walls are spectrally separated due to a pronounced Stark shift. Moreover, the patterned light emission can be dynamically controlled by electrically gating the ferroelectric domains, introducing a novel functionality beyond conventional semiconductor moiré systems. Our findings chart an exciting pathway for integrating nanometer-scale moiré ferroelectric domains with various optically active functional layers, paving the way for advanced nanophotonic applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_11159 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | An active metasurface enhanced with moiré ferroelectricity Kim, Dong Seob Xiao, Chengxin Dominguez, Roy C. Liu, Zhida Abudayyeh, Hamza Lee, Kyoungpyo Mayorga-Luna, Rigo Kim, Hyunsue Watanabe, Kenji Taniguchi, Takashi Shih, Chih-Kang Miyahara, Yoichi Yao, Wang Li, Xiaoqin Mesoscale and Nanoscale Physics Materials Science Semiconductor moiré systems, characterized by their periodic spatial light emission, unveil a new paradigm of active metasurfaces. Here, we show that ferroelectric moiré domains formed in a twisted hexagonal boron nitride (t-hBN) substrate can modulate light emission from an adjacent semiconductor MoSe$_2$ monolayer, enhancing its functionality as an active metasurface. The electrostatic potential at the surface of the t-hBN substrate provides a simple way to confine excitons in the MoSe$_2$ monolayer. The excitons confined within the domains and at the domain walls are spectrally separated due to a pronounced Stark shift. Moreover, the patterned light emission can be dynamically controlled by electrically gating the ferroelectric domains, introducing a novel functionality beyond conventional semiconductor moiré systems. Our findings chart an exciting pathway for integrating nanometer-scale moiré ferroelectric domains with various optically active functional layers, paving the way for advanced nanophotonic applications. |
| title | An active metasurface enhanced with moiré ferroelectricity |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2405.11159 |