单镜面附近激发态极化原子的自发辐射(英文)  

The spontaneous emission rate of polarized atom near a mirror

作　　者：唐文涛[1] 

机构地区：[1]荆楚理工学院,荆门448000

出　　处：《原子与分子物理学报》2014年第1期94-99,共6页Journal of Atomic and Molecular Physics

摘　　要：利用格林函数和费米黄金定律,我们计算了单镜面附近的激发态极化原子的自发辐射率.结果表明:原子的自发辐射与原子的极化偶极距取向有关,并且随着原子与镜面间距的增大,辐射率呈现正弦形式的振荡.当偶极距取向与镜面方向平行时,自发辐射的正弦式振荡最为激烈.但是随着极化方向与镜面方向夹角的增大,自发辐射的振荡越来越弱.当偶极距取向与镜面垂直时,振荡几乎消失.利用光子的闭合轨道理论,我们可以发现激发态原子偶极距取向影响辐射光子数的多少,从而可以改变原子的自发辐射率.The spontaneous emission（SE） properties of polarized atom in the vicinity of a perfect reflecting mirror is calculated using Fermi＇s golden rule and Green function approach. The results exhibit damping sine-like oscillations pattern which depend sensitively on the atomic position and the polarized orientation of atomic dipole moments. For the polarized direction parallel to the mirror plane, the oscillation is the greatest, and with the increase of the polarized angle, the oscillation in the decay rate becomes decreased. While for the perpendicular polarized direction, the oscillation is nearly vanished. The photon closed-orbit theory is successfully used to explain this phenomenon. It is found the polarized orientation of the atom can control the atomic spontaneous emission process by varying the rates of photon waves returning back.

关 键 词：自发辐射率 闭合轨道理论 单镜面模型 

分 类 号：O43[机械工程—光学工程]