红外与毫米波学报2018，Vol.37Issue(5)：523-526,532,5.DOI:10.11972/j.issn.1001-9014.2018.05.003
太赫兹时间分辨系统研究有机卤化物钙钛矿薄膜的超快太赫兹调制
Ultrafast terahertz modulation characteristics of organolead halide perovskite films revealed by time-resolved terahertz spectroscopy
摘要
Abstract
Ultrafast terahertz (THz) modulation characteristics of organolead halide perovskite films (CH3NH3PbI3 and CH3NH3PbI3-xClx) were investigated on picosecond time scales using time-resolved THz spectroscopy.Upon photo-excitation,a transient decrease in THz transmission was observed.Compared with CH3NH3PbI3,CH3NH3PbI3-xClx showed a better modulation depth (10％) within the range of the photo-excitation powers used.The mechanism underpinning this photoconductive ultrafast response was determined by measuring the transmission properties and calculating the carrier density.The larger crystalline bulk of the CH3NH3PbI3-xClx film produced higher carrier densities than the CH3NH3PbI3 film.These results demonstrate that CH3NH3PbI3-xClx films are promising materials for developing high-performance THz modulators and ultrafast switchable THz photoelectric devices.关键词
太赫兹/有机卤化物钙钛矿/超快调制Key words
Terahertz/organolead halide perovskite/ultrafast modulation分类
数理科学引用本文复制引用
张波,吕龙锋,沈京玲..太赫兹时间分辨系统研究有机卤化物钙钛矿薄膜的超快太赫兹调制[J].红外与毫米波学报,2018,37(5):523-526,532,5.基金项目
Supported by the National Natural Science Foundation of China (61505125) （61505125）
