Abstract

Optical resonant cavities with high quality factor (Q-factor) are widely used in science and technology for their capabilities of strong confinement of light and enhanced light–matter interaction. The 2D photonic crystal structure with bound states in the continuum (BICs) is a novel concept for resonators with ultra-compact device size, which can be used to generate surface emitting vortex beams based on symmetry-protected BICs at the Γ point. Here, to the best of our knowledge, we demonstrate the first photonic crystal surface emitter with a vortex beam by using BICs monolithically grown on CMOS-compatible silicon substrate. The fabricated quantum-dot BICs-based surface emitter operates at 1.3 µm under room temperature (RT) with a low continuous wave (CW) optically pumped condition. We also reveal the BIC's amplified spontaneous emission with the property of a polarization vortex beam, which is promising to provide a novel degree of freedom in classical and quantum realms.

© 2023 Optica Publishing Group

Observation of terahertz transition from Fano resonances to bound states in the continuum

Laura Pilozzi, Mauro Missori, and Claudio Conti
Opt. Lett. 48(9) 2381-2384 (2023)

Photonic topological subspace-induced bound states in the continuum

Wenchao Yan, Weijie Liu, Weizhao Cheng, and Feng Chen
Opt. Lett. 48(17) 4532-4535 (2023)

Steerable merging bound states in the continuum on a quasi-flatband of photonic crystal slabs without breaking symmetry

Xin Qi, Jiaju Wu, Feng Wu, Mina Ren, Qian Wei, Yufei Wang, Haitao Jiang, Yunhui Li, Zhiwei Guo, Yaping Yang, Wanhua Zheng, Yong Sun, and Hong Chen
Photon. Res. 11(7) 1262-1274 (2023)

Topological corner state localized bound states in continuum in photonic crystals

Zhenbin Zhang, Banxian Ruan, Enduo Gao, Chao Liu, and Hongjian Li
Opt. Lett. 49(7) 1782-1785 (2024)

Merging bound states in the continuum in all-dielectric metasurfaces for ultrahigh-Q resonances

Xueyang Zong, Lixia Li, and Yufang Liu
Opt. Lett. 48(19) 5045-5048 (2023)