Reconfigurable and Recyclable Low-Threshold Quasi-BIC Lasers via a Tunable polymer Coating
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arXiv
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| Format: | Preprint |
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2026
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| author | Wang, Xiaolin Liu, Jiayao Zeng, Zimeng Yuan, Hongyu Li, Zhuoyang He, Zelong Gong, Wenping Wang, Zhaona |
| author_facet | Wang, Xiaolin Liu, Jiayao Zeng, Zimeng Yuan, Hongyu Li, Zhuoyang He, Zelong Gong, Wenping Wang, Zhaona |
| contents | Reconfigurable and sustainable microcavity lasers are highly desirable for next-generation integrated photonics. Here, we report a recyclable, low-threshold quasi-bound state in the continuum (q-BIC) laser fabricated via low-cost, high-throughput interference lithography. By introducing a polyvinyl alcohol (PVA) coating on a dye-doped photonic crystal, we suppress out-of-plane symmetry breaking, which reinforces optical confinement and reduces the lasing threshold. The q-BIC modes are further tuned through tailoring the refractive-index of the PVA layer by using Kramers-Kronig relation via Rhodamine 6G doping, demonstrating a wavelength shift of 7.14 nm and a sensitivity of 215 nm RIU as a sensing prob. More importantly, lasing modes are reversibly tuning via precisely controlling the coating thickness. Exploiting the dissolving and re-coating process, the laser is repeatedly reconfigured while maintaining performance. This work provides a sustainable and adaptive platform for sensing and reconfigurable photonic systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_16422 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Reconfigurable and Recyclable Low-Threshold Quasi-BIC Lasers via a Tunable polymer Coating Wang, Xiaolin Liu, Jiayao Zeng, Zimeng Yuan, Hongyu Li, Zhuoyang He, Zelong Gong, Wenping Wang, Zhaona Optics Reconfigurable and sustainable microcavity lasers are highly desirable for next-generation integrated photonics. Here, we report a recyclable, low-threshold quasi-bound state in the continuum (q-BIC) laser fabricated via low-cost, high-throughput interference lithography. By introducing a polyvinyl alcohol (PVA) coating on a dye-doped photonic crystal, we suppress out-of-plane symmetry breaking, which reinforces optical confinement and reduces the lasing threshold. The q-BIC modes are further tuned through tailoring the refractive-index of the PVA layer by using Kramers-Kronig relation via Rhodamine 6G doping, demonstrating a wavelength shift of 7.14 nm and a sensitivity of 215 nm RIU as a sensing prob. More importantly, lasing modes are reversibly tuning via precisely controlling the coating thickness. Exploiting the dissolving and re-coating process, the laser is repeatedly reconfigured while maintaining performance. This work provides a sustainable and adaptive platform for sensing and reconfigurable photonic systems. |
| title | Reconfigurable and Recyclable Low-Threshold Quasi-BIC Lasers via a Tunable polymer Coating |
| topic | Optics |
| url | https://arxiv.org/abs/2603.16422 |