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Linearly polarized lasing based on coupled perovskite microspheres

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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.

Graphical abstract: Linearly polarized lasing based on coupled perovskite microspheres

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Article information


Submitted
30 Oct 2019
Accepted
09 Jan 2020
First published
11 Jan 2020

Nanoscale, 2020, Advance Article
Article type
Communication

Linearly polarized lasing based on coupled perovskite microspheres

B. Zhou, Y. Zhong, M. Jiang, J. Zhang, H. Dong, L. Chen, H. Wu, W. Xie and L. Zhang, Nanoscale, 2020, Advance Article , DOI: 10.1039/C9NR09259E

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