Nonlinear absorption and density-dependent dephasing in Rydberg electromagnetically-induced-transparency media

• Verfasst von: Gärttner, Martin [VerfasserIn]
• Verfasst von: Evers, Jörg [VerfasserIn]
• Titel: Nonlinear absorption and density-dependent dephasing in Rydberg electromagnetically-induced-transparency media
• Verf.angabe: Martin Gärttner and Jörg Evers
• E-Jahr: 2013
• Jahr: 18 September 2013
• Umfang: 9 S.
• Fussnoten: Gesehen am 26.01.2021
• Titel Quelle: Enthalten in: Physical review / A
• Ort Quelle: College Park, Md., 1970
• Jahr Quelle: 2013
• Band/Heft Quelle: 88(2013,3) Artikel-Nummer 033417, 9 Seiten
• ISSN Quelle: 1094-1622
• DOI: doi:10.1103/PhysRevA.88.033417
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1745696709

Abstract

Light propagation through an ensemble of ultracold Rydberg atoms in an electromagnetically-induced-transparency (EIT) configuration is studied. In strongly interacting Rydberg EIT media, nonlinear optical effects lead to a nontrivial dependence of the degree of probe-beam attenuation on the medium density and on its initial intensity. We develop a Monte Carlo rate equation model that self-consistently includes the effect of the probe-beam attenuation to investigate the steady state of the Rydberg medium driven by two laser fields. We compare our results to recent experimental data and to results of other state-of-the-art models for light propagation in Rydberg EIT media. We find that for low probe field intensities, our results match the experimental data best if a density-dependent dephasing rate is included in the model. At higher probe intensities, our model deviates from other theoretical approaches, because it predicts a spectral asymmetry together with line broadening. These are likely due to off-resonant excitation channels, which, however, have not been observed in recent experiments. Atomic motion and coupling to additional Rydberg levels are discussed as possible origins for these deviations.