V型三能级量子点体系中的类相干粒子数囚禁现象  

The coherent population trapping like phenomenon in V type three level quantum dot system

作　　者：古丽姗[1] 宋艺华[1] 彭勇刚[2] 郑雨军[2] 

机构地区：[1]昌吉学院物理系,昌吉831100 [2]山东大学物理擎院,济南250100

出　　处：《中国科学：物理学、力学、天文学》2011年第10期1179-1183,共5页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(批准号:10674083,10874102);博士点基金(编号:200804220004)资助项目

摘　　要：采用产生函数(Generating Function)方法讨论了V型三能级量子点体系在泵浦场和探测场作用下的发射光子的统计特性.研究表明:在强泵浦场作用下,跃迁偶极矩垂直的V型三能级体系表现出Autler-Townes分裂现象;而在跃迁偶极矩平行的V型三能级系统表现出类似于相干粒子数囚禁的现象.通过所施加的探测场,我们可以调节量子点系统发射光子的开关状态.In this paper,we studied emission photons statistical properties of the V type three level system driven by a strong pump field and a weak probe filed using the generating function approach.The results demonstrate that the lineshape shows Autler-Townes splitting phenomenon for the case of electric dipole moments orthogonal.The lineshape,however,shows a coherent population trapping like phenomenon for the case of electric dipole moments parallel.We can control the emission photons of the system through modifying the frequency of probe field.

关 键 词：产生函数 V型三能级 光子统计 量子点 

分 类 号：O471.1[理学—半导体物理]