26 September 1997 Non-Markovian dephasing influence on two-wave interaction in a resonant medium
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Proceedings Volume 3239, Photon Echo and Coherent Spectroscopy; (1997) https://doi.org/10.1117/12.287705
Event: PECS '97: Photon Echo and Coherent Spectroscopy, 1997, Yoshkar-Ola, Russian Federation
Abstract
Saturation spectroscopy in inhomogeneously broadened media with excitation dependent dephasing is considered. We calculate probe beam absorption. As pump and probe fields are applied simultaneously, there is coherent contribution in probe field adsorption coefficient. It is displayed in box- like 'coherent' hole sitting on the smooth population- difference-hole seen by the probe field. We consider two models of polarization dephasing. First is based on modified Bloch equations (MBE) taking into account dephasing suppression by strong excitation. The second is developed on the base of non-Markovian perturbation theory (NMPT). We found the great disagreement between the results of these two models. Solution of MBE gives about 15% depth of the box-like hole relative to the maximum deviation of the probe absorption coefficient, whereas NMPT predicts 100%. This difference originates from Lorentzian approximation taken in MBE derivation. The last gives incorrect description of the wings of the homogeneous absorption line.
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R. N. Shakhmuratov, R. N. Shakhmuratov, R. A. Khasanshin, R. A. Khasanshin, } "Non-Markovian dephasing influence on two-wave interaction in a resonant medium", Proc. SPIE 3239, Photon Echo and Coherent Spectroscopy, (26 September 1997); doi: 10.1117/12.287705; https://doi.org/10.1117/12.287705
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