摘要
The ground-and the excited-state nonlinearities of two new copolymers are investigated in nanosecond scale at 1064 nm.It is found that the excited-state susceptibility is dramatically larger than the corresponding ground-state susceptibility for each sample.The experimental results also give evidence that superlattice structure of the copolymers can enhance,especially for the excited state,the molecular hyperpolarizabilities significantly.This enhancement may be attributed to the confinement effect of the pump-induced carriers.
作者
杨启光
司金海
刘旭春
徐刚
叶佩弦
雷自强
占肖卫
杨慕杰
YANG Qi-guang;SI Jin-hai;LIU Xu-chun;XU Gang;YE Pei-xian;LEI Zi-qiang;ZHAN Xiao-wei;YANG Mu-jie(Institute of Physics&Center for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100080;Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 310027)
基金
Supported by the National Natural Science Foundation of China under Grant No.19734004。
