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arXiv quant-ph/0610067quant-ph
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表面诱导势中原子的光激发谱

Optical excitation spectrum of an atom in a surface-induced potential

Fam Le Kien, S. Dutta Gupta, K. Hakuta

摘要:

研究了介质表面附近原子的光激发谱。我们计算了总散射率和进入倏逝模的散射率。与适当的评估的局限性,我们证明了便携性的平面结果的实验情况下,与一个小的。表面诱导势对自由-束缚跃迁激发谱的影响很弱。相反,束缚到束缚跃迁的影响是显著的,导致大的激发线宽,峰位的大幅度负移,以及场的负侧强的长尾和正侧的小的短尾--原子频率失谐.

英文摘要:

We study the optical excitation spectrum of an atom in the vicinity of a dielectric surface. We calculate the rates of the total scattering and the scattering into the evanescent modes. With a proper assessment of the limitations, we demonstrate the portability of the flat-surface results to an experimental situation with a nanofiber. The effect of the surface-induced potential on the excitation spectrum for free-to-bound transitions is shown to be weak. On the contrary, the effect for bound-to-bound transitions is significant leading to a large excitation linewidth, a substantial negative shift of the peak position, and a strong long tail on the negative side and a small short tail on the positive side of the field--atom frequency detuning.

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