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Two‐Photon Pumped CH 3 NH 3 PbBr 3 Perovskite Microwire Lasers
Author(s) -
Gu Zhiyuan,
Wang Kaiyang,
Sun Wenzhao,
Li Jiankai,
Liu Shuai,
Song Qinghai,
Xiao Shumin
Publication year - 2016
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201500597
Subject(s) - lasing threshold , materials science , perovskite (structure) , optoelectronics , halide , laser , whispering gallery wave , optical pumping , substrate (aquarium) , optics , resonator , inorganic chemistry , physics , chemistry , crystallography , wavelength , oceanography , geology
Solution‐processed lead halide perovskites have shown good applicability in both solar cells and microlasers. Very recently, the nonlinear properties of perovskites have attracted considerable research attention. Second harmonic generation and two‐photon absorption have been successfully demonstrated. However, perovskite devices based on these nonlinear properties, such as micro‐ and nanolasers have thus far not been fabricated. Here we demonstrate two‐photon pumped microlasers from CH 3 NH 3 PbBr 3 perovskite microwires. These CH 3 NH 3 PbBr 3 perovskite microwires are synthesized through a one‐step solution precipitation method and dispersed on a glass substrate. Under optical excitation at 800 nm, two‐photon pumped lasing action with periodic peaks is successfully observed at around 546 nm. The obtained quality (Q) factors of the two‐photon pumped microlasers are around 682, and the corresponding thresholds are about 674 µJ cm ‐2 . Both the Q factors and thresholds are comparable to conventional whispering‐gallery modes in two‐dimensional polygon microplates. This work is the first demonstration of two‐photon pumped microlasers in CH 3 NH 3 PbBr 3 perovskite microwires. We believe our finding will significantly expand the application of perovskites in low‐cost nonlinear optical devices, such as optical limiters, optical switches, and biomedical imaging devices.