有限层周期电介质中受限原子的反射光谱  

Reflection spectroscopy of atoms confined in periodic dielectric medium with several layers

作　　者：李莉[1] 李姝丽[1] 赵小侠[1] 张相武[1] 李院院[1] 

机构地区：[1]西安文理学院应用物理研究所,西安710065

出　　处：《激光杂志》2015年第6期19-22,共4页Laser Journal

摘　　要：本文讨论了受限于有限层周期电介质中原子的反射光谱,发现受限原子数密度N0及周期性结构的层数N对反射线型均产生显著影响。当N=2时其线型具有明显的不对称特性,这种不对称特性主要来自于光场与原子共振产生的选择反射的贡献。当N=6及10时,带隙反射贡献增强,线型的对称性增强。有限层结构中受限原子在N0为1016,1017及1018/cm3量级时,所有线型均呈Dicke窄化结构,其反射坑的线宽在59 MHz至157MHz间变化。N0相同时,反射坑的线宽随N的增大而减小;N=2及4时,线宽随N0的增大而减小;而当N=10时,线宽随N0的增大而增大。研究结果可望用于受限原子与系统的相互作用势的测量。This paper examines reflection spectroscopy of atoms confined in periodic dielectric medium with several layers,it is shown that the lines shape can be modified both by atomic number density N0 and the periodic structure numbers N. Asymmetric lines exist apparently for N = 2,this is mainly due to the contribution of atom- field interaction. As N = 6 and 10,band gap induced reflection plays important role,and symmetry lines are observed. Dicke-narrowing structure exists in all lines with widths in the range of 59- 157 MHz as N0 is in the order of 1016,1017and1018/ cm3. The width of the reflective dip decreases as N increases for the same N0; the width decreases as N0 increases for N = 2 and 4; however,it increases for increasing N0 as N = 10. The result can be probably used in the measuring the interaction between atoms and confines system.

关 键 词：光谱 受限原子 选择反射 Dicke窄化 

分 类 号：O562.3[理学—原子与分子物理]