posted on 2023-04-12, 14:04authored byHaijun Tang, Yuhan Wang, Yimu Chen, Kaiyang Wang, Xianxiong He, Can Huang, Shumin Xiao, Shaohua Yu, Qinghai Song
Lead halide perovskites have been promising platforms
for micro-
and nanolasers. However, the fragile nature of perovskites poses an
extreme challenge to engineering a cavity boundary and achieving high-quality
(Q) modes, severely hindering their practical applications. Here,
we combine an etchless bound state in the continuum (BIC) and a chemically
synthesized single-crystalline CsPbBr3 microplate to demonstrate
on-chip integrated perovskite microlasers with ultrahigh Q factors.
By pattering polymer microdisks on CsPbBr3 microplates,
we show that record high-Q BIC modes can be formed by destructive
interference between different in-plane radiation from whispering
gallery modes. Consequently, a record high Q-factor of 1.04 ×
105 was achieved in our experiment. The high repeatability
and high controllability of such ultrahigh Q BIC microlasers have
also been experimentally confirmed. This research provides a new paradigm
for perovskite nanophotonics.