不同原子密度下共振线自增宽的激发依赖性
Excitation dependence of resonance line self-broadening at different atomic densities
摘要：
研究了高原子密度下自加宽占主导时共振线的偶极-偶极谱展宽。在大失谐泵浦光的作用下，记录了弱探测光在铷原子池窗口和铷原子蒸气界面上的选择反射谱。由于泵浦而产生的激发减小了自展宽。我们发现，自加宽的减少依赖于泵浦功率是原子密度无关。这些结果为基于无序激子的自展宽理论提供了实验依据，并可用于描述强光场与致密共振介质的相互作用。
英文摘要：
We study the dipole-dipole spectral broadening of a resonance line at high atomic densities when the self-broadening dominates. The selective reflection spectrum of a weak probe beam from the interface of the cell window and rubidium vapor are recorded in the presence of a far-detuned pump beam. The excitation due to the pump reduces the self-broadening. We found that the self-broadening reduction dependence on the pump power is atomic density independent. These results provide experimental evidence for the disordered exciton based theory of self-broadening, and can be useful for the description of the interaction of a strong optical field with a dense resonance medium.
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