反-4,4'-双(N,N-二丁胺基)二苯乙烯分子双光子吸收性质研究  

Studies on two-photon absorption of E-4,4'bis(N,N-di-n-butylamino)stilbene

作　　者：赵珂[1] 孙元红[1] 李洪玉[1] 王传奎[1] 张献[2] 于晓强[2] 蒋民华[2] 

机构地区：[1]山东师范大学物理与电子科学学院,济南250014 [2]山东大学晶体材料国家重点实验室,济南250100

出　　处：《原子与分子物理学报》2005年第2期243-247,共5页Journal of Atomic and Molecular Physics

基　　金：山东省优秀中青年科学家奖励基金(批准号:03BS061)资助

摘　　要：对于实验室合成的反4,4' 双(N,N 二丁胺基)二苯乙烯分子,实验测量了该分子的单光子和双光子荧光谱,然后从理论上研究了其单光子和双光子吸收特性。研究结果表明,在低能量范围内,分子的单光子吸收主要发生在分子的第一激发态,而分子的双光子吸收主要发生在分子的第二和第四激发态上。该分子在相应系列衍生物中具有最大的双光子吸收截面。分子的相关能对分子的激发态能量影响较大。我们给出了分子基态与电荷转移态的电荷转移过程,并从理论上定性解释了双光子聚合反应的聚合机理。The one-photon and two-photon fluorescence spectra of E-4,4'-bis(N,N-di-n-butylamino)stilbene synthesized in laboratory are measured and the properties of one-photon and two-photon absorptions are studied theoretically. The results show that in the visible light region, the maximal one-photon absorption strength of the molecule occurs in the first excited state, while the two-photon absorption cross section mainly appears in the second and forth excited states. The molecule has the largest two-photon absorption cross section among its series of studied derivatives. The effect of the electron correlation on the energies of excited states is obvious. The charge-transfer process for the ground and charge-transfer state is displayed, and then the mechanism of photopolymerization is qualitatively discussed.

关 键 词：双光子吸收 响应函数方法 有机共扼分子 

分 类 号：O437.1[机械工程—光学工程]