Ultra‐thin curved visible microdisk lasers with three‐dimensional whispering gallery modes
Taojie Zhou, Kar Wei Ng, Xiankai Sun, Zhaoyu Zhang
Abstract
Abstract Microdisk lasers are important components in photonic integrated circuits (PICs), of which the whispering gallery modes (WGMs) are usually confined within a two‐dimensional (2D) planar slab. Here, owing to the strain relaxation of quantum wells by wet‐etching method, we present ultra‐thin curved visible microdisk lasers with single‐mode lasing emission and a high quality factor of ∼17,000, which enable a 3D spatial intensity distribution of WGMs and provide an extra degree of freedom for the confined photons compared with the conventional 2D in‐plane WGMs. The curved microdisk lasers with a 3D spatial profile of WGMs may provide attractive applications in flexible and multilevel photon sources for the PICs.