Efficient light upconversion via resonant exciton-exciton annihilation of dark excitons in few-layer transition metal dichalcogenides
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| Autores principales: | , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Acceso en línea: | |
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| _version_ | 1866917949275635712 |
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| author | Chen, Yi-Hsun Lo, Ping-Yuan Boschen, Kyle W. Hsu, Chih-En Hsu, Yung-Ning Holtzman, Luke N. Peng, Guan-Hao Huang, Chun-Jui Holbrook, Madisen Wang, Wei-Hua Barmak, Katayun Hone, James Hawrylak, Pawel Hsueh, Hung-Chung Davis, Jeffrey A. Cheng, Shun-Jen Fuhrer, Michael S. Chen, Shao-Yu |
| author_facet | Chen, Yi-Hsun Lo, Ping-Yuan Boschen, Kyle W. Hsu, Chih-En Hsu, Yung-Ning Holtzman, Luke N. Peng, Guan-Hao Huang, Chun-Jui Holbrook, Madisen Wang, Wei-Hua Barmak, Katayun Hone, James Hawrylak, Pawel Hsueh, Hung-Chung Davis, Jeffrey A. Cheng, Shun-Jen Fuhrer, Michael S. Chen, Shao-Yu |
| contents | In this work, we report a pronounced light upconversion in few-layer transition metal dichalcogenides. Our joint theory-experiment study attributes the upconversion photoluminescence to a resonant exciton-exciton annihilation involving a pair of dark excitons with opposite momenta, followed by the spontaneous emission of upconverted bright excitons, which can have a high upconversion efficiency. Additionally, the upconversion photoluminescence is generic in MoS2, MoSe2, WS2, and WSe2, showing a high tuneability from green to ultraviolet light. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_03387 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Efficient light upconversion via resonant exciton-exciton annihilation of dark excitons in few-layer transition metal dichalcogenides Chen, Yi-Hsun Lo, Ping-Yuan Boschen, Kyle W. Hsu, Chih-En Hsu, Yung-Ning Holtzman, Luke N. Peng, Guan-Hao Huang, Chun-Jui Holbrook, Madisen Wang, Wei-Hua Barmak, Katayun Hone, James Hawrylak, Pawel Hsueh, Hung-Chung Davis, Jeffrey A. Cheng, Shun-Jen Fuhrer, Michael S. Chen, Shao-Yu Materials Science Mesoscale and Nanoscale Physics In this work, we report a pronounced light upconversion in few-layer transition metal dichalcogenides. Our joint theory-experiment study attributes the upconversion photoluminescence to a resonant exciton-exciton annihilation involving a pair of dark excitons with opposite momenta, followed by the spontaneous emission of upconverted bright excitons, which can have a high upconversion efficiency. Additionally, the upconversion photoluminescence is generic in MoS2, MoSe2, WS2, and WSe2, showing a high tuneability from green to ultraviolet light. |
| title | Efficient light upconversion via resonant exciton-exciton annihilation of dark excitons in few-layer transition metal dichalcogenides |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2409.03387 |