三能级Λ型原子系统中边频对相位调制光栅的影响  

Effect of Sideband on Phase Grating in a Three-level Λ-type Atomic System

作　　者：郭洪菊 潘杰 李森 王丽[2] GUO Hongju;PAN Jie;LI Sen;WANG Li(Shanghai Publishing and Printing College,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Physics and Electronics Engineering,Nanyang Normal College,Nanyang,Henan 473061,China)

机构地区：[1]上海理工大学上海出版印刷高等专科学校,上海200093 [2]南阳师范学院物理与电子工程学院,河南南阳473061

出　　处：《山东科技大学学报（自然科学版）》2018年第6期100-107,共8页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：上海市自然科学基金项目(14ZR1414300);上海市教育发展基金晨光计划项目(16CGB10)

摘　　要：利用原子相干与干涉效应研究了三能级∧型原子系统中边频对相位调制电磁感应光栅的影响。结果表明由于边频相干,该结构中电磁感应透明窗口从一个拓展到多个。调节合适的边频强度,分析吸收色散性质,利用边频相干效应,相位衍射光栅强度尤其是一阶衍射得到增强。该系统内合适的探测场失谐、边频与中心频率之间的频差、相互作用长度也对相位调制光栅效率起到增强作用。该研究对于发展新颖的量子信息光学、量子网络及光学成像等方面的器件有着潜在的应用。In this paper, the effect of sideband on the electromagnetically induced phase grating in a three-level ∧-type atomic system was studied. The results show that owing to sideband coherence, the number of windows of electromagnetically induced transparency in this structure extends from one to many. By analyzing the character of absorption and dispersion and taking advantage of sideband coherence, the diffraction intensity of the grating, especially the first-order diffraction can be enhanced significantly via tuning the sideband intensity. The diffraction efficiency of phase grating can also be further enhanced by choosing appropriate detuning of the probe field, frequency difference between the sideband and central component of the pump field, and the interaction length. The study can be used to develop novel photonic devices for quantum information processing, quantum networking and optical imaging.

关 键 词：电磁感应光栅 衍射强度 边频相干 电磁感应透明 吸收色散 

分 类 号：O436[机械工程—光学工程]