强耦合激子-声子系统中的三阶非线性光学系数的理论计算  

Theoretical Calculation of the Third Order Nonlinear Optical Properties in Strongly Coupled Exciton-Phonon Systems

作　　者：姚鸣[1] 朱卡的[2] 袁晓忠[2] 蒋逸文[2] 吴卓杰[2] 

机构地区：[1]宁夏大学物理电气信息学院,银川750001 [2]上海交通大学物理系,上海200030

出　　处：《光子学报》2005年第10期1480-1484,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(No.10274051);上海市自然科学基金(No.03ZR14060)资助课题

摘　　要：应用Dyson-Maleev变换,对强耦合激子—声子系统中非线性光学性质进行了理论研究.结果表明,当信号光场频率与激子频率的失谐量等于光学声子的频率时,系统的非线性光学吸收和克尔(Kerr)系数显著增大,从而证明了激子-声子的强相互作用对介质的非线性光学性质的影响相当大,并且当考虑激子偏离玻色子模型时,这种影响将进一步增大.The third order nonlinear optical properties in strongly coupled exciton-phonon systems are investigated theoretically. It is shown that as the signal field frequency detuning from the exciton frequency is equal to the optical phonon frequency the nonlinear optical absorptions and Kerr coefficient are enhanced significantly. The results also demonstrate that the phase-space filling effect has an evident impact on the nonlinear optical properties of the system.

关 键 词：非线性光学效应 克尔系数 激子 光学声子 相空间填充因子 

分 类 号：O437.2[机械工程—光学工程]