Can a linearly polarized light beam polarize atomic spin?

被引：2
|
作者：
Yoshikawa, Y
Satake, K
Mitsui, T
Sasada, H
机构：
[1] Keio Univ, Fac Sci & Technol, Dept Phys, Kouhoku Ku, Yokohama, Kanagawa 2238522, Japan
[2] Keio Univ, Sch Med, Dept Phys, Kouhoku Ku, Yokohama, Kanagawa 2238521, Japan
来源：
OPTICS COMMUNICATIONS | 2001年 / 190卷 / 1-6期
关键词：
linearly polarized light beam; Gaussian beam; paraxial approximation; optical pumping; atomic spin polarization;
D O I：
10.1016/S0030-4018(01)01020-3
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Lax et al. [Phys. Rev. 11 (1975) 1365] discovered that a light beam in vacuum is not a transverse wave but does have a longitudinal field component. We investigate atomic and molecular electric dipole transitions induced by such a light beam, in particular, linearly polarized in a transverse plane. We derive the selection rules and the transition rates for various quantization axes using the paraxial approximation up to the first order of 1/kw. where k is the wave number and w is the transverse size of the light beam. The light beam is able to yield atomic spin polarization in the direction perpendicular to both the optical axis and the transverse electric field, and its magnitude is approximately 1/kw times that generated by a circularly polarized light wave with the similar intensity. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：173 / 178
页数：6
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