Dual-color Coherent Perfect Absorber
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arXiv
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866914801851039744 |
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| author | Xue, Boyi Lin, Jintian Hou, Jiankun Zhu, Yicheng Ma, Ruixin Chen, Xianfeng Cheng, Ya Ge, Li Wan, Wenjie |
| author_facet | Xue, Boyi Lin, Jintian Hou, Jiankun Zhu, Yicheng Ma, Ruixin Chen, Xianfeng Cheng, Ya Ge, Li Wan, Wenjie |
| contents | Perfect absorption of light critically affects light-matter interaction for various applications. Coherent perfect absorbers (CPA) gain the unique capability of controlling light with light in a linear fashion. Multi-color CPAs [Phys. Rev. Lett. 107, 033901] are highly desirable for broadband and nonlinear light-to-light coherent control, however, the experimental demonstration has still remained elusive. Here we experimentally observe a dual-color version of CPA (DC-CPA) through a second harmonic generation in a single whispering-gallery-mode microcavity. The DC-CPA enables simultaneous perfect absorption of both the incoming fundamental wave and its second harmonic. Similar to its linear counterpart, coherent control in the DC-CPA can be also realized by tuning the relative phase and intensity between the two-colored waves through nonlinear interference instead of the linear one. This scheme breaks the linear boundary of the traditional CPA into a multi-frequency domain and paves the way toward all-optically signal processing and quantum information. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_11153 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Dual-color Coherent Perfect Absorber Xue, Boyi Lin, Jintian Hou, Jiankun Zhu, Yicheng Ma, Ruixin Chen, Xianfeng Cheng, Ya Ge, Li Wan, Wenjie Optics Perfect absorption of light critically affects light-matter interaction for various applications. Coherent perfect absorbers (CPA) gain the unique capability of controlling light with light in a linear fashion. Multi-color CPAs [Phys. Rev. Lett. 107, 033901] are highly desirable for broadband and nonlinear light-to-light coherent control, however, the experimental demonstration has still remained elusive. Here we experimentally observe a dual-color version of CPA (DC-CPA) through a second harmonic generation in a single whispering-gallery-mode microcavity. The DC-CPA enables simultaneous perfect absorption of both the incoming fundamental wave and its second harmonic. Similar to its linear counterpart, coherent control in the DC-CPA can be also realized by tuning the relative phase and intensity between the two-colored waves through nonlinear interference instead of the linear one. This scheme breaks the linear boundary of the traditional CPA into a multi-frequency domain and paves the way toward all-optically signal processing and quantum information. |
| title | Dual-color Coherent Perfect Absorber |
| topic | Optics |
| url | https://arxiv.org/abs/2405.11153 |