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Dark‐Field Sensors based on Organometallic Halide Perovskite Microlasers
Author(s) -
Wang Kaiyang,
Li Gang,
Wang Shuai,
Liu Shuai,
Sun Wenzhao,
Huang Can,
Wang Yujie,
Song Qinghai,
Xiao Shumin
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201801481
Subject(s) - materials science , plasmon , nanoscopic scale , halide , optoelectronics , nanotechnology , perovskite (structure) , laser , nanostructure , optics , inorganic chemistry , chemistry , physics , chemical engineering , engineering
The detection of nanoscale objects is essential for homeland security, environmental monitoring, and early‐stage diagnostics. In the past few years, optical sensors have mostly been developed with passive devices such as microcavity and plasmonic nanostructures, which require external laser sources to operate and significantly increase the costs and bulks of sensing systems. To date, the potential of their active counterparts in optical sensors has not been well explored. Herein, a novel and robust mechanism to detect nanoscale objects with lead halide perovskite microlasers is demonstrated. Nanoparticles can be simply detected and sized by measuring the intensity of scattered laser light. In principle, the proposed concept is also applicable to electrically driven microlasers and it could find applications in portable point‐of‐care devices.