期刊
PHOTONICS RESEARCH
卷 8, 期 9, 页码 A31-A38出版社
OPTICAL SOC AMER
DOI: 10.1364/PRJ.399960
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资金
- National Key Research and Development Program of China [2017YFE0123700, 2018YFB2200500]
- Strategic Priority Research Program of CAS [XDB16030400]
- National Natural Science Foundation of China [61520106012, 61674023, 61875211, 61905264, 61925507, 61975023]
- Open Fund of the State Key Laboratory of High Field Laser Physics (Shanghai Institute of Optics and Fine Mechanics)
- CAS Interdisciplinary Innovation Team
- Program of Shanghai Academic Research Leader [18XD1404200]
In recent years, halide perovskite nanostructures have had great advances and have opened up a bright future for micro/nanolasers. However, upconversion lasing by two-photon excitation with mode selection and high quality factor in one device is still rarely reported. Herein, two lasing modes are demonstrated in the all-inorganic perovskite CsPb2Br5 microplates with subwavelength thickness and uniform square shape. The net optical gain is quickly established in less than 1 ps and persists more than 30 ps, revealed by ultrafast transient absorption spectroscopy. The temperature-dependent low-threshold amplified spontaneous emission confirms the net gain for stimulated emission with a high characteristic temperature of 403 K, far surpassing the all-inorganic CsPbBr3 semiconductor gain media. Remarkably, upconversion lasing based on two kinds of microcavity effects, Fabry-Perot and whispering-gallery modes, from the microplates at room temperature is successfully achieved with a low threshold operating in multi- or single-mode, respectively. Surprisingly, the quality factor (similar to 3551) is among the best values obtained from perovskite micro/nanoplate upconversion lasers without an external cavity. Moreover, the highly stable chromaticity with color drift only less than 0.1 nm also outbalances the all-inorganic CsPbBr3 ones. These superior performances of CsPb2Br5 microplate lasing with a facile solution synthesis procedure will offer a feasible structure to fabricate specific fimctionalities for high-performance frequency upconversion micro/nanoscale photonic integrated devices. (C) 2020 Chinese Laser Press
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