Modulation and mechanism of ultrafast transient spectroscopy based on dimethylamino-carbaldehyde derivatives

作     者：Tong-xing Jin Jun-yi Yang Yu Fang Yan-bing Han Ying-lin Song 金桐兴;杨俊义;方宇;韩艳兵;宋瑛林

作者机构：College of PhysicsOptoelectronics and EnergySoochow UniversitySuzhou 215006China jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy ApplicationSchool of Mathematics and PhysicsSuzhou University of Science and TechnologySuzhou 215009China Department of PhysicsHarbin Institute of TechnologyHarbin 150001China 

出 版 物：《Chinese Physics B》 (中国物理B(英文版))

年 卷 期：2018年第27卷第5期

页      面：245-251页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0704[理学-天文学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.U1630103 and 11704273) Natural Science Foundation of Jiangsu Province,China(Grant No.BK20170375) Natural Science Foundation of the Higher Education Institutions of Jiangsu Province,China(Grant No.17KJB140021) 

主　　题：nonlinear optics transient absorption spectra dimethylamino-carbaldehyde derivatives 

摘      要：Two dimethylamino-carbaldehyde derivatives with differentπ-bridge lengths were prepared,and their transient optical properties and photophysical mechanisms were investigated by transient absorption spectroscopy and Z-scan *** to the difference in molecular structures,the two compounds exhibit different populations of locally excited states and,therefore,they also produce different transient absorption *** photoexcitation,both molecular materials exhibit a wide excited state absorption band from 450 nm to 1000 ***,the excited state lifetimes are dramatically different,2 ns and 100 ps,for the two molecules.A figure of merit greater than 2 at the wavelength of1000 nm is *** results show that modulating the population of the locally excited states in this type of molecule can be a promising approach for obtaining optical switching and solar cell materials.