Coherent perfect absorption of anti-modes in an indirect coupled magnon-polariton system
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866912963500179456 |
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| author | Lu, Chenyang Yao, Jiguang Wang, Jiongjie Xiao, Jiang Hu, Can-Ming |
| author_facet | Lu, Chenyang Yao, Jiguang Wang, Jiongjie Xiao, Jiang Hu, Can-Ming |
| contents | In this work, we report coherent perfect absorption (CPA) of anti-modes in an indirectly coupled magnon--polariton system. By examining both single and indirectly coupled cases, we experimentally distinguish the modal decay rate $γ$ from the effective decay rate $γ_{\rm{eff}}$. At CPA, $γ_{\rm{eff}} = 0$, leading to a vanishing output and a visually narrow spectrum in the dB-scale, while the intrinsic linewidth set by $2γ$ remains unchanged, demonstrating that the effective decay rate dictates the spectral amplitude rather than the physical loss. Furthermore, in the indirectly coupled system, CPA persists over a broad, magnetically tunable detuning range, in contrast to the single-detuning CPA observed in the directly coupled case, thereby enabling magnetically reconfigurable and frequency-selective microwave absorbers. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_12174 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Coherent perfect absorption of anti-modes in an indirect coupled magnon-polariton system Lu, Chenyang Yao, Jiguang Wang, Jiongjie Xiao, Jiang Hu, Can-Ming Mesoscale and Nanoscale Physics Optics In this work, we report coherent perfect absorption (CPA) of anti-modes in an indirectly coupled magnon--polariton system. By examining both single and indirectly coupled cases, we experimentally distinguish the modal decay rate $γ$ from the effective decay rate $γ_{\rm{eff}}$. At CPA, $γ_{\rm{eff}} = 0$, leading to a vanishing output and a visually narrow spectrum in the dB-scale, while the intrinsic linewidth set by $2γ$ remains unchanged, demonstrating that the effective decay rate dictates the spectral amplitude rather than the physical loss. Furthermore, in the indirectly coupled system, CPA persists over a broad, magnetically tunable detuning range, in contrast to the single-detuning CPA observed in the directly coupled case, thereby enabling magnetically reconfigurable and frequency-selective microwave absorbers. |
| title | Coherent perfect absorption of anti-modes in an indirect coupled magnon-polariton system |
| topic | Mesoscale and Nanoscale Physics Optics |
| url | https://arxiv.org/abs/2603.12174 |