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arXiv quant-ph/0307216quant-ph
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原子、偶极波和强聚焦光束

Atoms, dipole waves, and strongly focused light beams

S. J. van Enk

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8 pages, 3 figures
发表信息：
Phys. Rev.A 69, 043813 (2004)
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摘要：

通过将场展开为多极波，描述了原子与强聚焦光束的共振相互作用。对于经典光场或相干态光场，我们发现散射光的强度分布和光子统计都完全由一组参数决定。一个关键的参数是场与原子中相应偶极跃迁对应的适当偶极波的重叠。我们计算了一组特定的强聚焦纵向偏振光的重叠，其光斑尺寸仅为$0.1λ^2$，如S. Quabis等人，应用物理B { \bf 72}，109（2001）。

英文摘要：

We describe the resonant interaction of an atom with a strongly focused light beam by expanding the field in multipole waves. For a classical field, or when the field is described by a coherent state, we find that both intensity pattern and photon statistics of the scattered light are fully determined by a small set of parameters. One crucial parameter is the overlap of the field with the appropriate dipole wave corresponding to the relevant dipole transition in the atom. We calculate this overlap for a particular set of strongly focused longitudinally polarized light beams, whose spot size is only $0.1λ^2$, as discussed in S. Quabis, et al., Appl. Phys. B {\bf 72}, 109 (2001).

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