Nonreciprocal singularities dominated by the dissipative photon-magnon coupling in non-Hermitian systems
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866911896177737728 |
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| author | Shi, Yongzhang Zhang, Chi Hao, Zhenhui Jiang, Changjun Ong, C. K. Xia, Ke Chai, Guozhi |
| author_facet | Shi, Yongzhang Zhang, Chi Hao, Zhenhui Jiang, Changjun Ong, C. K. Xia, Ke Chai, Guozhi |
| contents | We investigated the magnon-photon coupling in an open cavity magnonic system, which leads to two different nonreciprocal singularities dominated by the dissipative coupling. One type of singularity is the exceptional point, which is just on the exceptional surface in parameter space. The other type of singularity is the bound state in the continuum discovered in the level-attraction-like coupling, which is above the exceptional surface. In experiment, we realized the two different singularities with nonreciprocity and selectivity in an open cavity magnonic system with suitable dissipation rating. Our results can be understood well with the pseudo-Hermitian theory of magnon-polariton system. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2405_17869 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Nonreciprocal singularities dominated by the dissipative photon-magnon coupling in non-Hermitian systems Shi, Yongzhang Zhang, Chi Hao, Zhenhui Jiang, Changjun Ong, C. K. Xia, Ke Chai, Guozhi Mesoscale and Nanoscale Physics Other Condensed Matter We investigated the magnon-photon coupling in an open cavity magnonic system, which leads to two different nonreciprocal singularities dominated by the dissipative coupling. One type of singularity is the exceptional point, which is just on the exceptional surface in parameter space. The other type of singularity is the bound state in the continuum discovered in the level-attraction-like coupling, which is above the exceptional surface. In experiment, we realized the two different singularities with nonreciprocity and selectivity in an open cavity magnonic system with suitable dissipation rating. Our results can be understood well with the pseudo-Hermitian theory of magnon-polariton system. |
| title | Nonreciprocal singularities dominated by the dissipative photon-magnon coupling in non-Hermitian systems |
| topic | Mesoscale and Nanoscale Physics Other Condensed Matter |
| url | https://arxiv.org/abs/2405.17869 |