The Driven Two-Level Atom

Mark P. Silverman

B. R. Mollow, Marvin M. Miller

R. Bonifacio, Brian W J McNeil, Gordon R. M. Robb

Jinyun Liu, Feng-Dong Jia, Xiao-Kang Li +4 more

We have deduced analytical solutions of an energy level diagram of the doubly driven/dressed atom for a two-level atom exposed to a strong near-resonant bichromatic laser field in a special case, i.e., the bichromatic field with frequencies ω 1 and ω 2 , and Rabi frequencies Ω 1 and Ω 2 , in which the first coupling field of Ω 1 acts on the bare atomic levels, and then the resulting singly dressed states are driven by the second coupling field of Ω 2 , thus resulting in the doubly dressed atom. We have measured the probe absorption spectra of a doubly driven two-level atom. The system consists of 5 2 S 1 / 2 , F = 2 and 5 2 P 3 / 2 , F ′ = 3 states of 87 Rb atoms in a magneto-optical trap (MOT) as well as the cooling/trapping beams and an additional coupling field. As for the spectroscopic properties of the doubly driven two-level atom, theoretical analytical solutions are in general agreement with the experimental spectrum as a whole.

Matthias Jakob, Gagik Yu. Kryuchkyan

Squeezing effects in the resonance fluorescence of a bichromatically driven two-level atom are investigated. Unusual squeezing properties appear in comparison to the monochromatic driving field cases. It is demonstrated that these properties are strongly correlated to two-photon-emission processes, which play an important role in the resonance fluorescence of a bichromatically driven two-level atom.