Mode selection and high-quality upconversion lasing from perovskite CsPb2Br5 microplates

查看全文 作　　者：ZHENGZHENG [1,2]LIU;CHUNWEI [1,3,4]WANG;ZHIPING [2,5]HU;JUAN [1,2,4]DU;JIE [5]YANG;ZEYU [1,2]ZHANG;TONGCHAO [1,2]SHI;WEIMIN [3]LIU;XIAOSHENG [5]TANG;AND YUXIN [1,2,3,4]LENG

机构地区：[1]State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science,Shanghai Institute of Optics and Fine Mechanics(SIOM),Chinese Academy of Sciences(CAS),Shanghai 201800,China;[2]Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China;[3]School of Physical Science and Technology,ShanghaiTech University,Shanghai 200031,China;[4]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;[5]Key Laboratory of Optoelectronic Technology&Systems(Ministry of Education),College of Optoelectronic Engineering,Chongqing University,Chongqing 400044,China

出　　处：《Photonics Research》索引2020年第8卷第9期,共8页

基　　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 Inn。 摘　　要：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–Pérot 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(~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 functionalities for high-performance frequency upconversion micro/nanoscale photonic integrated devices. 关键词：LASING HIGH PLATES

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Mode selection and high-quality upconversion lasing from perovskite CsPb2Br5 microplates

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