LIGHT-INDUCED TORQUE ON MOVING ATOMS
LIGHT-INDUCED TORQUE ON MOVING ATOMS
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DOI：
10.1103/physrevlett.73.1239
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发表时间：
1994-08-29
影响因子：
8.6
通讯作者：
ALLEN, L
中科院分区：
文献类型：
--
作者：
BABIKER, M;POWER, WL;ALLEN, L
我们证明了在拉盖尔-高斯光束中运动的二能级原子在光束轴上受到光致转矩T的影响，该转矩与模式的轨道角动量量子数l成正比。转矩具有洛伦兹频率响应，其中包括失谐项中与方位l相关的多普勒频移，在饱和极限下降低到简单形式T几乎等于HBARlGAMMA，其中2GAMMA是激发态的衰减率。
We show that a two-level atom moving in a Laguerre-Gaussian beam is subject to a light-induced torque, T, about the beam axis which is directly proportional to l, the orbital angular momentum quantum number of the mode. The torque, which has a Lorentzian frequency response which includes an azimuthal l-dependent Doppler shift in the detuning term, reduces in the saturation limit to the simple form T almost-equal-to HBARlGAMMA, where 2GAMMA is the decay rate of the excited state.