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Transient response of a two-level atom to bichromatic laser field excitations

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Abstract

Theoretical studies have shown that the transient dynamics of an undamped two-level atom, driven by a bichromatic laser field consisting of a strong resonant pump and a moderate strength tunable perturber, are complex. Among the interesting results, it has been found that the strong field tends to stabilize the atom against the influence of the perturber field.1 Exceptions occur when the perturber is detuned from the strong field by the Rabi frequency of the pump or its subharmonics. In addition, it has been found that the atomic response depends strongly on the initial relative phase of the two excitation-field components.1,2 We have constructed an experimental apparatus to study the transient response of two-level like Yb atoms to bichromatic field excitations. The transient bichromatic laser field is generated by sending a dye laser beam double pass through an AOM driven by a bichromatic rf field. All the optical field parameters, amplitudes, frequencies, and phases, are controlled by corresponding rf field parameters.

© 1991 Optical Society of America

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