ATOMS, SPECTRA, RADIATIONS

Experimental study of the resonance radiation group delay in degenerate systems

R. A. Akhmedzhanov, I. V. Zelensky

Institute of Applied Physics, Russian Academy of Sciences, Nizhnii Novgorod

Abstract: The dependence of the polarization-and intensity-modulation group delay on the polarization of electromagnetic wave was studied experimentally for different transitions between the hfs components of the ⁸⁷Rb D ₁ absorption line. It was found that the polarization-modulation delay strongly depends on the degeneracy structure of resonant transition and, in the general case, on the ellipticity of light-wave polarization. It is demonstrated that the polarization-modulation delay does not occur for the transitions not involving dark states. The polarization delay was studied as a function of the polarization ellipticity angle. The intensity-modulation delay was measured for the resonance radiation to show that it is observed for all ⁸⁷Rb D ₁-line transitions and is independent of polarization.

PACS: 42.25.Ja, 42.50.Gy

Received: 12.02.2004

 English version: Journal of Experimental and Theoretical Physics Letters, 2004, 79:6, 268–271

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