相干控制光电流的物理研究及进展  

Physical Research and Progress of Coherent Control Photocurrent

作　　者：寿倩[1] 

机构地区：[1]华南师范大学光子信息技术广东省高校重点实验室,广东广州510631

出　　处：《光电技术应用》2011年第4期22-27,共6页Electro-Optic Technology Application

基　　金：国家自然科学基金(60908003)

摘　　要：从产生相干控制光电流的基础理论,即直接带隙半导体的Kane能带模型及其基于黄金跃迁定则的跃迁矩阵元入手,给出了光生载流子在激发路径不同相对相位差下的动量空间分布图,揭示了相干控制光电流的物理实质,即产生动量空间不对称分布、某一方向分布占优的载流子而产生电流,通过激发光场的相位对电流的大小和方向进行控制。最后介绍了相干控制光电流在理论和实验方面的研究进展。Starting with the basic theory of the coherent control photocurrent, namely the Kane energy band mode and the Golden transition rule, the distribution of the photo-induced carries in the momentum space is demonstrated under several phase differences between the two exciting paths. The physical substance of the coherent control photocurrent is revealed, it is the result of the asymmetric distribution of the photo-carrier in momentum space and its magnitude and direction are controlled by the phase difference of the exiting light fields. The experimental and theoretical progress on the coherent control photocurrent is reviewed.

关 键 词：相干控制光电流 Kane能带模型 黄金定则微扰理论 动量空间分布 

分 类 号：O415[理学—理论物理] O471[理学—物理]