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Current issue   Ukr. J. Phys. 2017, Vol. 62, N 4, p.299-305


Sizhuk A.S.1, Yezhov S.M.2

1 Department of Radiophysics, Taras Shevchenko National University of Kyiv
(4-g, Academician Glushkov Ave., Kyiv 03022, Ukraine; e-mail: andrii.sizhuk@gmail.com)
2 Faculty of Physics, Taras Shevchenko National University of Kyiv
(2, Building 1, Academician Glushkov Ave., Kyiv 03022, Ukraine)

Application of the Generalized Absorptance for Accounting the Recoil and Doppler Effects

Section: Optics, Lasers, and Quantum Electronics
Original Author's Text: English

Abstract:  A method of calculation of the absorption coefficient in the terms of quantum optics with regard for the quantization of the electromagnetic field and the Doppler effect is presented. It is shown that the local value of the absorption coefficient non-linearly depends on the atomic density and initial intensity. The analytically derived results are demonstrated in graphs for the the local absorption coefficient as a function of the frequency. The relatively strong dependence of the absorptance on the path length of an optical light beam is caused by the interatomic coupling through the intermediary of an electromagnetic field. The splitting of the absorption line induced by the Doppler effect in the system placed between mirrors is demonstrated.

Key words: absorption coefficient, quantum optics, Doppler effect, commutation relation, approximate evaluation.