Linearly polarized lasing based on coupled perovskite microspheres. Issue 10 (12th February 2020)

• Record Type: Journal Article
• Authors: Zhou, Beier; Zhong, Yichi; Jiang, Mingming; Zhang, Jianhao; Dong, Hongxing; Chen, Linqi; Wu, Hao; Xie, Wei; Zhang, Long
• Is Part Of: Nanoscale. Volume 12:Issue 10(2020)
• Page Start: 5805
• Page End: 5811
• Publication Date: 2020-02-12
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c9nr09259e
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : We achieve linearly polarized single-mode lasing based on the Vernier effect in perovskite microspheres. Abstract : The polarization of lasing, as a fundamental property related to the emission coherence of microlasers, is one of the criteria for a high quality laser beam but has been rarely investigated. Unlike conventional lasers which can be induced by highly polarized seed light or by using a polarizing film, the microlaser for on-chip integrated photonic circuits generally possesses a low degree of polarization due to unpolarized spontaneous emission. Here, we firstly demonstrate that the Vernier effect can be used to improve the degree of polarization from ∼0.2 to 0.78 based on metal halide perovskite microspheres. After coupling, linearly polarized single-mode lasing with a low threshold and high quality can be achieved. In addition, by using the finite element method, the mode distributions of CsPbBr3 microspheres before and after coupling are analyzed systematically and a clear physical diagram of coupled resonances is obtained. Our work clearly suggests that a coupled linearly polarized single-mode microlaser by the Vernier effect would offer a real step closer to the platform for on-chip integrated photonics.