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arXiv 1406.0108quant-phphysics.atom-phphysics.optics
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光从原子到原子导模的光的散射的各向异性

Anisotropy in scattering of light from an atom into the guided modes of a nanofiber

Fam Le Kien, A. Rauschenbeutel

摘要:

本文研究了铯原子在$D_2$线的超精细能级$6S_{1/2}F=4$和$6P_{3/2}F'=5$之间跃迁到铯原子导模时的导光散射。我们表明,从原子的引导光的散射率在稳态制度到导模是不对称的,相对于向前和向后的方向,并依赖于探测场的偏振。前向和后向散射之间的不对称性是原子的复杂跃迁结构和导模轮廓函数的纵向分量的存在的结果。在二能级原子的情况下,当原子偶极矩阵元矢量是包含光纤轴和原子位置的平面中的复矢量时,进入前向和后向导模的自发发射速率(以及因此散射速率)彼此不同。

英文摘要:

We study the scattering of guided light from a multilevel cesium atom with the transitions between the hyperfine levels $6S_{1/2}F=4$ and $6P_{3/2}F'=5$ of the $D_2$ line into the guided modes of a nanofiber. We show that the rate of scattering of guided light from the atom in the steady-state regime into the guided modes is asymmetric with respect to the forward and backward directions and depends on the polarization of the probe field. The asymmetry between the forward and backward scattering is a result of the complex transition structure of the atom and the existence of a longitudinal component of the guided-mode profile function. In the case of a two-level atom, the rates of spontaneous emission (and consequently the rates of scattering) into the forward and backward guided modes differ from each other when the atomic dipole matrix-element vector is a complex vector in the plane that contains the fiber axis and the atomic position.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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