电子-声子相互作用对柱形量子线中光学克尔效应的影响(英文)  

Electron-Phonon Interaction on the Optical Kerr Effect in Cylindrical Quantum Wires

作　　者：郭康贤[1] 陈传誉[1] 

机构地区：[1]广州大学物理系,广州510405

出　　处：《光子学报》2006年第2期180-183,共4页Acta Photonica Sinica

基　　金：SupportedbytheNationalNaturalScienceFundationofChina(No.60478010),ScienceandTechnologyCommitteeofGuangdongProvince(No.2005B10301014,2004B10301014,and04105406),andScienceandTechnologyCommitteeofGuangzhou(No.2024and2004J1-C0226)

摘　　要：本文利用密度矩阵方法研究了柱形量子线中的光学克尔效应,重点讨论了电子-声子相互作用对其的影响,并以GaAs量子线为例进行了数值计算。结果显示,随着量子线半径R0的减小,光学克尔效应会逐渐增强;考虑了电子-声子相互作用时的光学克尔效应比未考虑电子-声子相互作用时的大20%多;量子线半径R0越小,峰越尖锐,峰值越强;当量子线半径R0大于40nm时,峰会逐渐消失.The optical Kerr effect in cylindrical quantum wires is investigated with density-matrix approach, most emphasis is devoted to the electron-phonon interactions on the optical Kerr effect. With characteristic parameters pertaining to GaAs quantum wire, the numerical results are presented. It is shown that, the optical Kerr effect increases as the wire radius R0 decreases; the optical Kerr considering the electron-LO-phonon interactions is over twenty percent greater than the one without considering the electron- phonon interactions; the smaller the wire radius R0 ,the sharper the peak will be, and the larger the peak intensity will be; when the wire radius R0 is greater than 40 nm, the peak will disappear gradually.

关 键 词：光学克尔效应 量子线 电子-声子相互作用 

分 类 号：O431.2[机械工程—光学工程]