Λ型三能级系统中的光信息存储与提取  

Storage and restoration of optical information in a Λ-three-level system

作　　者：仇旭[1] 李永放[1] 程建军[1] 樊荣[1] 任立庆[1] 刘娟[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710062

出　　处：《陕西师范大学学报（自然科学版）》2008年第5期22-26,共5页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：陕西省自然科学基金资助项目(2007A04)

摘　　要：以光子回波技术原理为基础,应用密度矩阵数值解和布洛赫矢量解析法,分析了Λ型三能级系统中实现光信息存储、提取的物理机制.结果表明,该方法对信息的存储时间、信息提取信号的大小均优于二能级系统.According to the principle of the photon echoes, the physical mechanism of the light information storage and restoration is investigated and discussed by numerical calculation with density matrix equation and analytic method with Bloch vectors in a A-three-level system. It is shown that not only the information storage time but the magnitude of information restoration signal are better than what are carried out in a two-level system.

关 键 词：信息存储 布洛赫矢量 极化强度 

分 类 号：O431.1[机械工程—光学工程]