搜索

x
中国物理学会期刊

准Λ型四能级系统中的超窄谱线的研究

CSTR: 32037.14.aps.51.36
CSTR: 32037.14.aps.51.36
PDF
导出引用
  • 在一般Λ型三能级模型的基础上提出准Λ型四能级系统,并对准Λ型四能级模型的共振荧光谱作了详尽的研究.从上能级向两边下能级辐射的自发辐射谱中产生了三个超窄谱线,且在很大参数范围内光谱具有这一特性.三个超窄谱线的产生是和两个相干驱动场的Rabi频率密切相关,在较大的Rabi频率作用下谱线会变得更窄,而当只有一个驱动场作用时是不会产生谱线变窄效应的.能级间的碰撞弛豫和非相干激发严重地破坏了谱线变窄.这种超窄谱线效应是多通道量子干涉的结果

     

    WepresentanewQuasi Λ model four levelsystembasedonageneralthree levelΛ modelandinvestigatetheresonantfluorescencespectroscopyindetail.Therearethreeultra narrowspectrallinesinthespontaneousemissionspectrafromupperleveltolower lyinglevelsofthetwoemissionchannels,whichoccuroverawiderangeoftheparameters.Theappearanceofthethreeultra narrowspectrallinesiscloselyrelatedwithRabifrequencyofthetwocoherencedrivingfields;andthelargertheRabifrequency ,thenarrowerthelines.Theeffectoflinenarrowingdoesn’toccurwhenthereisonlyacoherencedrivingfield .Whiletheincoherenttransitionandthecollisionaldecaybetweentheenergylevelsdestroythefeatureofthespectralnarrowingwhichmaybeconsideredtobetheresultofthemulti channelquantuminterference.

     

      Keywords:
    •  / 
    •  / 
    •  

    目录

    /

    返回文章
    返回