Reconfigurable Momentum-space vectorial lasing enabled by Quasi-BIC
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866911578059702272 |
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| author | Yuan, Hongyu Zeng, Zimeng Liu, Jiayao Li, Zhuoyang Wang, Xiaolin He, Zelong Wang, Zhaona |
| author_facet | Yuan, Hongyu Zeng, Zimeng Liu, Jiayao Li, Zhuoyang Wang, Xiaolin He, Zelong Wang, Zhaona |
| contents | Bound states in the continuum (BICs) have enabled lasers with rich momentum-space textures. However, the output patterns of quasi-BIC lasers remain largely static and confined to a few geometries. Here, a reconfigurable momentum-space vectorial laser was proposed based on two-dimensional photonic crystal. By selectively exciting quasi-BIC modes, we identify the geometric asymmetry factors favoring single BIC, dual-BIC, and radiative mode with BIC operation. This approach yields vectorial lasing with characteristic patterns lasing in momentum space of bidirectional double lobes (BDL), radially polarized ring with BDL, azimuthally polarized ring with BDL, and linearly polarized spot with BDL. Importantly, reversible switching between a single donut and a donut with BDL was achieved in the same device by varying the pump energy density. Our work establishes a compact, versatile platform for reconfigurable vectorial lasers, with potential applications in tunable optical tweezers, super-resolution imaging, and on-chip optical interconnects. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_07670 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Reconfigurable Momentum-space vectorial lasing enabled by Quasi-BIC Yuan, Hongyu Zeng, Zimeng Liu, Jiayao Li, Zhuoyang Wang, Xiaolin He, Zelong Wang, Zhaona Optics Applied Physics Bound states in the continuum (BICs) have enabled lasers with rich momentum-space textures. However, the output patterns of quasi-BIC lasers remain largely static and confined to a few geometries. Here, a reconfigurable momentum-space vectorial laser was proposed based on two-dimensional photonic crystal. By selectively exciting quasi-BIC modes, we identify the geometric asymmetry factors favoring single BIC, dual-BIC, and radiative mode with BIC operation. This approach yields vectorial lasing with characteristic patterns lasing in momentum space of bidirectional double lobes (BDL), radially polarized ring with BDL, azimuthally polarized ring with BDL, and linearly polarized spot with BDL. Importantly, reversible switching between a single donut and a donut with BDL was achieved in the same device by varying the pump energy density. Our work establishes a compact, versatile platform for reconfigurable vectorial lasers, with potential applications in tunable optical tweezers, super-resolution imaging, and on-chip optical interconnects. |
| title | Reconfigurable Momentum-space vectorial lasing enabled by Quasi-BIC |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2604.07670 |