Long-lived population inversion in resonantly driven excitonic antiferromagnet
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866909447435059200 |
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| author | Warshauer, Jacob A. Chen, Huyongqing Lopez, Daniel Alejandro Bustamante Tan, Qishuo Tang, Jing Ling, Xi Hu, Wanzheng |
| author_facet | Warshauer, Jacob A. Chen, Huyongqing Lopez, Daniel Alejandro Bustamante Tan, Qishuo Tang, Jing Ling, Xi Hu, Wanzheng |
| contents | Van der Waals magnets are an emerging material family for investigating light-matter interactions and spin-correlated excitations. Here, we report the discovery of a photo-induced state with a lifetime of 17 ps in the van der Waals antiferromagnet NiPS$_3$, which appears exclusively with resonant pumping at 1.476 eV in the antiferromagnetic state. The long-lived state comes with a negative photoconductivity, a characteristic optical response of population inversion. Our findings demonstrate a promising pathway to potentially achieve long-lived lasing at terahertz frequencies in reduced dimensions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_03705 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Long-lived population inversion in resonantly driven excitonic antiferromagnet Warshauer, Jacob A. Chen, Huyongqing Lopez, Daniel Alejandro Bustamante Tan, Qishuo Tang, Jing Ling, Xi Hu, Wanzheng Strongly Correlated Electrons Materials Science Van der Waals magnets are an emerging material family for investigating light-matter interactions and spin-correlated excitations. Here, we report the discovery of a photo-induced state with a lifetime of 17 ps in the van der Waals antiferromagnet NiPS$_3$, which appears exclusively with resonant pumping at 1.476 eV in the antiferromagnetic state. The long-lived state comes with a negative photoconductivity, a characteristic optical response of population inversion. Our findings demonstrate a promising pathway to potentially achieve long-lived lasing at terahertz frequencies in reduced dimensions. |
| title | Long-lived population inversion in resonantly driven excitonic antiferromagnet |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2412.03705 |