LIGHT-INDUCED TORQUE ON MOVING ATOMS

被引:167
|
作者
BABIKER, M [1 ]
POWER, WL [1 ]
ALLEN, L [1 ]
机构
[1] UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,BLACKETT LAB,OPT SECT,LONDON SW7 2BZ,ENGLAND
关键词
D O I
10.1103/PhysRevLett.73.1239
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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.
引用
收藏
页码:1239 / 1242
页数:4
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