Low-threshold nanolasers based on miniaturized bound states in the continuum

• DOI: 10.1126/sciadv.ade8817
• Publication Date: 2022-12-23T18:58:15Z
• Authors: Yuhao Ren; Peishen Li; Zhuojun Liu; Zihao Chen; You-Ling Chen; Chao Peng; Jin Liu
• Keywords: 0301 basic medicine; 0303 health sciences; 03 medical and health sciences; FOS: Physical sciences; Physical and Materials Sciences; 7. Clean energy; Physics - Optics; Optics (physics.optics)

The pursuit of compact lasers with low thresholds has imposed strict requirements on tight light confinements minimized radiation losses. Bound states in the continuum (BICs) have been recently demonstrated as an effective mechanism to trap light. However, most reported BIC are still bulky due absence in-plane confinement. Here, we combine BICs and photonic bandgaps realize three-dimensional confinements, referred miniaturized (mini-BICs). We demonstrate highly active mini-BIC resonators a record high-quality (Q) factor up 32,500, which enables single-mode lasing lowest threshold 80 W/cm2 among lasers. In addition, photon statistics measurements further confirm occurrence stimulated emission our devices. Our work reveals path toward ultralow power consumption potentially boosts applications cavity quantum electrodynamics, nonlinear optics, integrated photonics.