Spontaneous emission enhancement of colloidal perovskite nanocrystals by a photonic crystal cavity





Citation of Original Publication

Yang, Zhili et al. Applied Physics Letters 111 (Aug. 14, 2017), no https://aip.scitation.org/doi/10.1063/1.5000248. https://doi.org/10.1063/1.5000248


This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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We demonstrate coupling of lead halide perovskite nanocrystals to a nanophotonic cavity. From photoluminescence measurements, we observe a factor of 10 enhancement in brightness from the cavity mode emission. We perform room temperature time-resolved lifetime measurements that demonstrate an average spontaneous emission rate enhancement of 2.9 for perovskite nanocrystals within the cavity as compared to those located on the unpatterned surfaces. Our method provides a way towards realizing efficient light emitters and low-threshold lasers, as well as fast nonlinear optical devices, using solution processable materials.