Tunneling-induced π-phase shift with a single-photon signal field in asymmetric double quantum wells  

作　　者：郭洪菊 汪丽春 钮月萍 金石琦 龚尚庆 

机构地区：[1]State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences [2]Graduate University of Chinese Academy of Sciences

出　　处：《Chinese Optics Letters》2009年第10期886-890,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos.60708008 and 10734080);the Project of Academic Leaders in Shanghai (No.07XD14030);the Knowledge Innovation Program of the Chinese Academy of Sciences

摘　　要：A theoretical investigation is carried out into the cross phase modulation （XPM） in an asymmetric double A1GaAs/GaAs quantum wells structure with a common continuum. It is found that, combining resonant tunneling-induced transparency and constructive interference in the third-order Kerr effect, a giant XPM can be achieved with vanishing linear and nonlinear absorptions, accompanied by the velocities of the probe and signal fields being matched. Furthermore, this giant XPM could induce a π-phase shift at a single-photon level which is favorable for the applications in two-qubit quantum logic gates.A theoretical investigation is carried out into the cross phase modulation （XPM） in an asymmetric double A1GaAs/GaAs quantum wells structure with a common continuum. It is found that, combining resonant tunneling-induced transparency and constructive interference in the third-order Kerr effect, a giant XPM can be achieved with vanishing linear and nonlinear absorptions, accompanied by the velocities of the probe and signal fields being matched. Furthermore, this giant XPM could induce a π-phase shift at a single-photon level which is favorable for the applications in two-qubit quantum logic gates.

关 键 词：Kerr magnetooptical effect Magnetic field effects Particle beams Phase shift PHOTONS Quantum theory Wind tunnels 

分 类 号：O431.2[机械工程—光学工程]