Dark‐Field Sensors based on Organometallic Halide Perovskite Microlasers |
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Authors: | Kaiyang Wang Gang Li Shuai Wang Shuai Liu Wenzhao Sun Can Huang Yujie Wang Qinghai Song Shumin Xiao |
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Affiliation: | 1. State Key Laboratory on Tunable laser Technology, Ministry of Industry and Information Technology Key Lab of Micro‐Nano Optoelectronic Information System, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, P. R. China;2. Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, P. R. China |
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Abstract: | 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. |
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Keywords: | dark‐field sensors lead halide perovskites microlasers nanoparticle detection |
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