Abstract
It is shown that high-contrast resonance of electromagnetically induced transparency (EIT) in a ladder Ξ-system of 5S 1/2-5P 3/2-5D 5/2 levels can be formed in optical cells containing a column of rubidium vapor with thickness L in an interval of 100 nm ≤ L ≤ 780 nm. Using bichromatic laser radiation with certain parameters, an 83% contrast of the EIT resonance (or dark resonance, DR) has been achieved for a vapor column thickness of L = 780 nm. An important condition for the formation of high-contrast DR is that the frequency of the coupling laser radiation must be resonant with the frequency of the corresponding 5P 3/2-5D 5/2 transition (for the probe radiation frequency scanned over the 5S 1/2-5P 3/2 transition). It is also shown that a DR can be formed at a record small vapor column thickness of L ≈ 100 nm. Expressions that can be used to estimate the expected DR width at small L values are presented.
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Original Russian Text © D. Sarkisyan, A. Sargsyan, J. Keaveney, C.S. Adams, 2014, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2014, Vol. 146, No. 1, pp. 13–20.
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Sarkisyan, D., Sargsyan, A., Keaveney, J. et al. High-contrast atomic dark resonances formed in a ladder system of rubidium atoms in submicron structures. J. Exp. Theor. Phys. 119, 8–14 (2014). https://doi.org/10.1134/S1063776114060181
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DOI: https://doi.org/10.1134/S1063776114060181