Nonlinear optical diode effect in a magnetic Weyl semimetal
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2023
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| _version_ | 1866914742748053504 |
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| author | Tzschaschel, Christian Qiu, Jian-Xiang Gao, Xue-Jian Li, Hou-Chen Guo, Chunyu Yang, Hung-Yu Zhang, Cheng-Ping Xie, Ying-Ming Liu, Yu-Fei Gao, Anyuan Bérubé, Damien Dinh, Thao Ho, Sheng-Chin Fang, Yuqiang Huang, Fuqiang Nordlander, Johanna Ma, Qiong Tafti, Fazel Moll, Philip J. W. Law, Kam Tuen Xu, Su-Yang |
| author_facet | Tzschaschel, Christian Qiu, Jian-Xiang Gao, Xue-Jian Li, Hou-Chen Guo, Chunyu Yang, Hung-Yu Zhang, Cheng-Ping Xie, Ying-Ming Liu, Yu-Fei Gao, Anyuan Bérubé, Damien Dinh, Thao Ho, Sheng-Chin Fang, Yuqiang Huang, Fuqiang Nordlander, Johanna Ma, Qiong Tafti, Fazel Moll, Philip J. W. Law, Kam Tuen Xu, Su-Yang |
| contents | Diode effects are of great interest for both fundamental physics and modern technologies. Electrical diode effects (nonreciprocal transport) have been observed in Weyl systems. Optical diode effects arising from the Weyl fermions have been theoretically considered but not probed experimentally. Here, we report the observation of a nonlinear optical diode effect (NODE) in the magnetic Weyl semimetal CeAlSi, where the magnetization introduces a pronounced directionality in the nonlinear optical second-harmonic generation (SHG). We show demonstrate a six-fold change of the measured SHG intensity between opposite propagation directions over a bandwidth exceeding 250 meV. Supported by density-functional theory, we establish the linearly dispersive bands emerging from Weyl nodes as the origin of this broadband effect. We further demonstrate current-induced magnetization switching and thus electrical control of the NODE. Our results advance ongoing research to identify novel nonlinear optical/transport phenomena in magnetic topological materials and further opens new pathways for the unidirectional manipulation of light. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_15603 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Nonlinear optical diode effect in a magnetic Weyl semimetal Tzschaschel, Christian Qiu, Jian-Xiang Gao, Xue-Jian Li, Hou-Chen Guo, Chunyu Yang, Hung-Yu Zhang, Cheng-Ping Xie, Ying-Ming Liu, Yu-Fei Gao, Anyuan Bérubé, Damien Dinh, Thao Ho, Sheng-Chin Fang, Yuqiang Huang, Fuqiang Nordlander, Johanna Ma, Qiong Tafti, Fazel Moll, Philip J. W. Law, Kam Tuen Xu, Su-Yang Mesoscale and Nanoscale Physics Materials Science Optics Diode effects are of great interest for both fundamental physics and modern technologies. Electrical diode effects (nonreciprocal transport) have been observed in Weyl systems. Optical diode effects arising from the Weyl fermions have been theoretically considered but not probed experimentally. Here, we report the observation of a nonlinear optical diode effect (NODE) in the magnetic Weyl semimetal CeAlSi, where the magnetization introduces a pronounced directionality in the nonlinear optical second-harmonic generation (SHG). We show demonstrate a six-fold change of the measured SHG intensity between opposite propagation directions over a bandwidth exceeding 250 meV. Supported by density-functional theory, we establish the linearly dispersive bands emerging from Weyl nodes as the origin of this broadband effect. We further demonstrate current-induced magnetization switching and thus electrical control of the NODE. Our results advance ongoing research to identify novel nonlinear optical/transport phenomena in magnetic topological materials and further opens new pathways for the unidirectional manipulation of light. |
| title | Nonlinear optical diode effect in a magnetic Weyl semimetal |
| topic | Mesoscale and Nanoscale Physics Materials Science Optics |
| url | https://arxiv.org/abs/2307.15603 |