Absorption enhancement of an electric quadrupole transition of cesium atoms in an evanescent field
Absorption enhancement of an electric quadrupole transition of cesium atoms in an evanescent field
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DOI：
10.1103/physrevlett.92.053001
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发表时间：
2004-02-06
影响因子：
8.6
通讯作者：
Fujimoto, T
中科院分区：
文献类型：
--
作者：
Tojo, S;Hasuo, M;Fujimoto, T
我们首次观测到铯原子(6(2)S(1/2)-5（2)D(5/2)）线的四极电跃迁反射光谱，入射角从θ (c)-11.9到θ (c)+107.5 mrad，其中θ (c)是全反射的临界角。通过与衰减全反射中计算的吸收比较，发现s和p极化的振荡器强度随着入射角的增加而增加，分别在θ (c)+83.8 mrad处增加1.5倍，在θ (c)+107.5 mrad处增加2.4倍。对于倏逝光中四极跃迁的振荡强度，观测到的增强与入射角的关系与计算得到的结果一致。
We have observed for the first time reflection spectra of an electric quadrupole transition for the cesium atom (6(2)S(1/2)-5(2)D(5/2)) line at an angle of incidence from theta(c)-11.9 to theta(c)+107.5 mrad, where theta(c) is the critical angle for total reflection. From a comparison with the calculated absorption in the attenuated total reflection, the oscillator strengths for s and p polarizations were found to increase with an increase in the angle of incidence by a factor up to 1.5 at theta(c)+83.8 mrad and 2.4 at theta(c)+107.5 mrad, respectively, in the experiment. The dependences of the observed enhancement on the angle of incidence were in good agreement with the calculated ones for the oscillator strength of the quadrupole transition in the evanescent light.