摘要
建立了一套光泵浦探针法测量CdS晶体光学非线性快过程的实验,同时测定外加电场对激子-电子相互作用时间的影响,以揭示光学非线性的特性和起源.通过计算机数值计算模拟得出:在没有外加电场作用下,激子-电子相互作用的衰减时间为60ps.由实验结果可以看出外加电场使衰减时间略有延长.
The pump-probe method is employed to measure the temporal process of theoptical nonlinear absorption of CdS crystals and the effect of external electric field on theelectron-exciton interaction in CdS crystal, to reveal the origin and characteristic of thatoptical nonlinearity. By simulation numerically, the decay time of electron-exciton interac-tion is about 60ps while the external electric field is not applied to CdS crystal. And the ex-perimental result shows that the decay time can be extended by external electric field.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第2期153-158,共6页
Journal of Infrared and Millimeter Waves
基金
国家自然科学基金(重大项目)资助项目
关键词
光学非线性
吸收
硫化镉
电场效应
optical nonlinear absorption, exciton, exciton-electron scattering, electric field enhancement effect
