Two-Photon Absorption and Excited State Dynamics of Two Organic Molecules Containing Donor/Acceptor Moieties  

作　　者：闫永丽 李波 刘康俊 董志伟 马国宏 王筱梅 钱士雄 

机构地区：[1]Depa. rtment of physics: Fudan ,University Shang. hai 200433 [2]Surface Physics Lab (National Key Lab), Fudan University, Shanghai 200433 [3]Department of Physics, Shanghai University,. Shanghai 200444 [4]College of Material Science and Engineering, Suzhou University, Suzhou 215021

出　　处：《Chinese Physics Letters》2008年第7期2456-2459,共4页中国物理快报（英文版）

基　　金：Supported the Leading Academic Discipline Programme （T0104）, the National Natural Science Foundation of China under Grant Nos 10374020 and 10674031, and the Seventh Graduate Students Innovation Foundation of Fudan University.

摘　　要：Two new two-photon absorption （TPA） molecules, named SK-G1 and NT-G1, are synthesized and the photo- physical characteristics are investigated by using linear absorption spectra, one-photon fluorescence spectra and two-photon excited fluorescence spectra. Both the compounds exhibit TPA properties, and the TPA values determined by z-scan measurement are 10 GM and 39 GM for SK-G1 and NT-G1, respectively, at wavelength 80Ohm. Time-resolved spectroscopic techniques are employed to further explore the excited state dynamics of NT-G l with larger TPA cross section. The research results show that there is an ultrafast intraband energy transfer process （about 3ps） before the formation of charge transfer state with a relatively long lifetime.Two new two-photon absorption （TPA） molecules, named SK-G1 and NT-G1, are synthesized and the photo- physical characteristics are investigated by using linear absorption spectra, one-photon fluorescence spectra and two-photon excited fluorescence spectra. Both the compounds exhibit TPA properties, and the TPA values determined by z-scan measurement are 10 GM and 39 GM for SK-G1 and NT-G1, respectively, at wavelength 80Ohm. Time-resolved spectroscopic techniques are employed to further explore the excited state dynamics of NT-G l with larger TPA cross section. The research results show that there is an ultrafast intraband energy transfer process （about 3ps） before the formation of charge transfer state with a relatively long lifetime.

关 键 词：NONLINEAR-OPTICAL PROPERTIES ULTRAFAST DYNAMICS CROSS-SECTIONS LIMITING PROPERTIES DATA-STORAGE CHROMOPHORES MICROFABRICATION TRIPHENYLAMINE FLUORESCENCE CORE 

分 类 号：O572.31[理学—粒子物理与原子核物理]