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Perovskite CsPbX 3 : A Promising Nonlinear Optical Material and Its Applications for Ambient All‐Optical Switching with Enhanced Stability
Author(s) -
Wu Leiming,
Chen Keqiang,
Huang Weichun,
Lin Zhitao,
Zhao Jinlai,
Jiang Xiantao,
Ge Yanqi,
Zhang Feng,
Xiao Quannan,
Guo Zhinan,
Xiang Yuanjiang,
Li Jianqing,
Bao Qiaoliang,
Zhang Han
Publication year - 2018
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201800400
Subject(s) - materials science , perovskite (structure) , photonics , optoelectronics , optical switch , caesium , signal beam , signal (programming language) , optical communication , optics , beam (structure) , physics , chemistry , computer science , programming language , nuclear physics , crystallography
Perovskites are demonstrated as an excellent prospect for applications in all‐optical switching due to their excellent nonlinear optical effects. In this contribution, 2D cesium lead iodine (CsPbI 3 ) quantum dots (QDs) and cesium lead bromine iodine (CsPbBr x I 3− x ) nanosheets (NSs) are prepared, characterized, and applied in all‐optical switching, and their asymmetric nonlinear optical response is also investigated. Moreover, the impact of the beam distortion on the CsPbI 3 QDs and CsPbBr x I 3− x NSs is systematically analyzed. An all‐optical switching technique based on perovskite QDs and NSs is experimentally investigated, which is realized by modulating the propagation of the signal beam with another controlling beam using spatial cross‐phase modulation. The achievement of all‐optical switching indicates that perovskites can be developed as an excellent optical material for all‐optical signal processing. The contribution reveals the potential applications of perovskites as a new type of optical information material, and it is therefore anticipated that CsPbI 3 QDs, CsPbBr x I 3− x NSs, and other 2D perovskite NSs could find promising applications in photonics devices (such as optical modulators, optical switchers, and detectors).