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<p>We investigate Doppler-free absorption lines induced by counter-propagating polychromatic optical fields in the D<sub>1</sub> line of <sup>87</sup>Rb atoms. Cases of orthogonal and parallel polarizations are considered. The resonance associated with <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11448_2025_4165_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="48" /> </InlineMediaObject> <EquationSource Format="TEX">\({{F}_{e}} = 1\)</EquationSource> <!--JETPLet2560561Velichansky-m1--> </InlineEquation> demonstrates unusual behavior with two-photon detuning: the amplitude grows while the width becomes smaller. The crossover resonance involving transitions to both sublevels <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11448_2025_4165_Article_IEq2.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="64" /> </InlineMediaObject> <EquationSource Format="TEX">\({{F}_{e}} = 1,2\)</EquationSource> <!--JETPLet2560561Velichansky-m2--> </InlineEquation> of the excited state is more pronounced at parallel polarizations than at orthogonal and has smaller width compared to the lines corresponding to atomic transitions. A qualitative explanation of experimentally observed features is given.</p>

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Double-Frequency Doppler-Free Spectroscopy of 87Rb Atoms

  • 期刊论文

  • 发表日期：

    2025年4月15日

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  • V. L. Velichansky,
  • K. M. Sabakar,
  • A. S. Fedorov,
  • E. A. Tsygankov,
  • D. S. Chuchelov,
  • M. I. Vaskovskaya,
  • V. V. Vassiliev,
  • S. A. Zibrov

摘要

We investigate Doppler-free absorption lines induced by counter-propagating polychromatic optical fields in the D1 line of 87Rb atoms. Cases of orthogonal and parallel polarizations are considered. The resonance associated with \({{F}_{e}} = 1\) demonstrates unusual behavior with two-photon detuning: the amplitude grows while the width becomes smaller. The crossover resonance involving transitions to both sublevels \({{F}_{e}} = 1,2\) of the excited state is more pronounced at parallel polarizations than at orthogonal and has smaller width compared to the lines corresponding to atomic transitions. A qualitative explanation of experimentally observed features is given.