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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2301.12555 |
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| _version_ | 1866913455480504320 |
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| author | Zhang, Zhuquan Gao, Frank Y. Curtis, Jonathan B. Liu, Zi-Jie Chien, Yu-Che von Hoegen, Alexander Wong, Man Tou Kurihara, Takayuki Suemoto, Tohru Narang, Prineha Baldini, Edoardo Nelson, Keith A. |
| author_facet | Zhang, Zhuquan Gao, Frank Y. Curtis, Jonathan B. Liu, Zi-Jie Chien, Yu-Che von Hoegen, Alexander Wong, Man Tou Kurihara, Takayuki Suemoto, Tohru Narang, Prineha Baldini, Edoardo Nelson, Keith A. |
| contents | Magnons are quantized collective spin-wave excitations in magnetically ordered materials. Revealing their interactions among these collective modes is crucial for the understanding of fundamental many-body effects in such systems and the development of high-speed information transport and processing devices based on them. Nevertheless, identifying couplings between individual magnon modes remains a long-standing challenge. Here, we demonstrate spectroscopic fingerprints of anharmonic coupling between distinct magnon modes in an antiferromagnet, as evidenced by coherent photon emission at the sum and difference frequencies of the two modes. This discovery is enabled by driving two magnon modes coherently with a pair of tailored terahertz fields and then disentangling a mixture of nonlinear responses with different origins. Our approach provides a route for generating nonlinear magnon-magnon mixing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2301_12555 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Terahertz field-induced nonlinear coupling of two magnon modes in an antiferromagnet Zhang, Zhuquan Gao, Frank Y. Curtis, Jonathan B. Liu, Zi-Jie Chien, Yu-Che von Hoegen, Alexander Wong, Man Tou Kurihara, Takayuki Suemoto, Tohru Narang, Prineha Baldini, Edoardo Nelson, Keith A. Materials Science Optics Magnons are quantized collective spin-wave excitations in magnetically ordered materials. Revealing their interactions among these collective modes is crucial for the understanding of fundamental many-body effects in such systems and the development of high-speed information transport and processing devices based on them. Nevertheless, identifying couplings between individual magnon modes remains a long-standing challenge. Here, we demonstrate spectroscopic fingerprints of anharmonic coupling between distinct magnon modes in an antiferromagnet, as evidenced by coherent photon emission at the sum and difference frequencies of the two modes. This discovery is enabled by driving two magnon modes coherently with a pair of tailored terahertz fields and then disentangling a mixture of nonlinear responses with different origins. Our approach provides a route for generating nonlinear magnon-magnon mixing. |
| title | Terahertz field-induced nonlinear coupling of two magnon modes in an antiferromagnet |
| topic | Materials Science Optics |
| url | https://arxiv.org/abs/2301.12555 |