Ultracompact high-Q whispering gallery mode microresonator in a non-closed waveguide path
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arXiv
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| Auteurs principaux: | , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866917016923799552 |
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| author | Xiong, Ziyang Lin, Tong Li, Liu Deng, Hao Wang, Haoran Fan, Yan Chen, Shihua Lu, Junpeng Ni, Zhenhua |
| author_facet | Xiong, Ziyang Lin, Tong Li, Liu Deng, Hao Wang, Haoran Fan, Yan Chen, Shihua Lu, Junpeng Ni, Zhenhua |
| contents | Integrated photonic circuits are foundational for versatile applications, where high-performance traveling-wave optical resonators are critical. Conventional whispering-gallery mode microresonators (WGMRs) confine light in closed-loop waveguide paths, thus inevitably occupy large footprints. Here, we report an ultracompact high loaded Q silicon photonic WGMR in an open curved path instead. By leveraging spatial mode multiplexing, low-loss mode converter-based photonic routers enable reentrant photon recycling in a single non-closed waveguide. The fabricated device achieves a measured loaded Q-factor of 1.78*10^5 at 1554.3 nm with a 1.05 nm free spectral range in a ultracompact footprint of 0.00137 mm^2-6*smaller than standard WGMRs while delivering 100*higher Q-factor than photonic crystal counterparts. This work pioneers dense integration of high-performance WGMR arrays through open-path mode recirculation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_13784 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ultracompact high-Q whispering gallery mode microresonator in a non-closed waveguide path Xiong, Ziyang Lin, Tong Li, Liu Deng, Hao Wang, Haoran Fan, Yan Chen, Shihua Lu, Junpeng Ni, Zhenhua Optics Integrated photonic circuits are foundational for versatile applications, where high-performance traveling-wave optical resonators are critical. Conventional whispering-gallery mode microresonators (WGMRs) confine light in closed-loop waveguide paths, thus inevitably occupy large footprints. Here, we report an ultracompact high loaded Q silicon photonic WGMR in an open curved path instead. By leveraging spatial mode multiplexing, low-loss mode converter-based photonic routers enable reentrant photon recycling in a single non-closed waveguide. The fabricated device achieves a measured loaded Q-factor of 1.78*10^5 at 1554.3 nm with a 1.05 nm free spectral range in a ultracompact footprint of 0.00137 mm^2-6*smaller than standard WGMRs while delivering 100*higher Q-factor than photonic crystal counterparts. This work pioneers dense integration of high-performance WGMR arrays through open-path mode recirculation. |
| title | Ultracompact high-Q whispering gallery mode microresonator in a non-closed waveguide path |
| topic | Optics |
| url | https://arxiv.org/abs/2510.13784 |