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. 2018 Mar 6;5(5):1700780. doi: 10.1002/advs.201700780

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© 2018 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Whispering‐gallery mode analysis of the perovskite nanoplatelet laser. a) Far‐field lasing image, simulated field distributions at resonant cavity mode: b) transverse magnetic mode and c) transverse electric mode of typical hexagonal CH₃NH₃PbI₃ nanoplatelets. d) Lasing spectra of hexagonal CH₃NH₃PbI₃ nanoplatelets e) Lasing spectra is dependent on the edge length of a triangular CH₃NH₃PbI₃ whispering‐gallery cavity. f) The wavelength of lasing modes (pink star dots) and Q‐factor (dark yellow dots). Reproduced with permission.105 Copyright 2014, American Chemical Society.