Graduate Thesis Or Dissertation
 

Response of two-level atoms to intense amplitude modulated laser beams

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  • The optical Bloch equations for a two-level atom in a laser beam with an amplitude of arbitrary time dependence are derived in the rotating wave approximation. The light scattered by the atom is investigated for the special case of an intense, resonant laser beam with a sinusoidally modulated amplitude. The coherent part and the incoherent part of the spectrum and the coherent part and the incoherent part of the total scattered intensity are calculated. The results for this modulated amplitude dynamic Stark effect and for the constant amplitude dynamic Stark effect are compared. The modulation introduces new peaks in the frequency distribution. The total intensities when plotted as functions of the average Rabi frequency exhibit parametric resonances. The results in the limit of zero modulation depth are in agreement with the results of the constant amplitude dynamic Stark effect.
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