CAJ | 학술논문

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40 nm时,峰会逐渐消失.
본문이용밀도구진방법연구료주형양자선중적광학극이효응, 중점토론료전자-성자상호작용대기적영향,병이GaAs양자선위례진행료수치계산.결과현시,수착양자선반경R0적감소,광학극이효응회축점증강;고필료전자-성자상호작용시적광학극이효응비미고필전자-성자상호작용시적대20%다;양자선반경R0월소,봉월첨예,봉치월강;당양자선반경R0대우40 nm시,봉회축점소실.
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.