Role of the Exciton-Polariton in a Continuous-Wave Optically Pumped CsPbBr3Perovskite Laser
Shang,Qiuyu1; Li,Meili1; Zhao,Liyun1; Chen,Dingwei2; Zhang,Shuai3; Chen,Shulin4,8; Gao,Peng4,8; Shen,Chao2; Xing,Jun5; Xing,Guichuan6; Shen,Bo4,7; Liu,Xinfeng3; Zhang,Qing1,7
Source PublicationNano Letters
AbstractLead halide perovskites have emerged as excellent optical gain materials for solution-processable and flexible lasers. Recently, continuous-wave (CW) optically driven lasing was established in perovskite crystals; however, the mechanism of low-threshold operation is still disputed. In this study, CW-pumped lasing from one-dimensional CsPbBr3 nanoribbons (NBs) with a threshold of ∼130 W cm-2 is demonstrated, which can be ascribed to the large refractive index induced by the exciton-polariton (EP) effect. Increasing the temperature reduces the exciton fraction of EPs, which decreases the group and phase refractive indices and inhibits lasing above 100 K. Thermal management, including reducing the NB height to ∼120 ± 60 nm and adopting a high-thermal-conductivity sink, e.g., sapphire, is critical for CW-driven lasing, even at cryogenic temperatures. These results reveal the nature of ultralow-threshold lasing with CsPbBr3 and provide insights into the construction of room-temperature CW and electrically driven perovskite macro/microlasers.
Keywordcontinuous-wave laser CsPbBr3 exciton-polariton low threshold microlaser perovskite
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Cited Times [WOS]:25   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
Corresponding AuthorZhang,Qing
Affiliation1.Department of Materials Science and Engineering,College of Engineering,Peking University,Beijing,100871,China
2.State Key Laboratory of Superlattices and Microstructures,Institute of Semiconductors,Chinese Academy of Sciences,Beijing,100083,China
3.CAS,Key Laboratory of Standardization and Measurement for Nanotechnology,CAS Center of Excellence for Nanoscience,National Center for Nanoscience and Technology,Beijing,100190,China
4.School of Physics,Peking University,Beijing,100871,China
5.Key Laboratory of Eco-Chemical Engineering,Ministry of Education,College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao,266042,China
6.Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macau,Avenida da Universidade Taipa,999078,Macao
7.Research Center for Wide Gap Semiconductor,Peking University,Beijing,100871,China
8.Electron Microscopy Laboratory,International Center for Quantum Materials,School of Physics,Peking University,Beijing,100871,China
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GB/T 7714
Shang,Qiuyu,Li,Meili,Zhao,Liyun,et al. Role of the Exciton-Polariton in a Continuous-Wave Optically Pumped CsPbBr3Perovskite Laser[J]. Nano Letters,2020,20(9):6636-6643.
APA Shang,Qiuyu,Li,Meili,Zhao,Liyun,Chen,Dingwei,Zhang,Shuai,Chen,Shulin,Gao,Peng,Shen,Chao,Xing,Jun,Xing,Guichuan,Shen,Bo,Liu,Xinfeng,&Zhang,Qing.(2020).Role of the Exciton-Polariton in a Continuous-Wave Optically Pumped CsPbBr3Perovskite Laser.Nano Letters,20(9),6636-6643.
MLA Shang,Qiuyu,et al."Role of the Exciton-Polariton in a Continuous-Wave Optically Pumped CsPbBr3Perovskite Laser".Nano Letters 20.9(2020):6636-6643.
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