Abstract

The fluorescence and absorption spectra of an atom driven by an intense, resonant laser field have been a subject of considerable interest for many years. More recently, the interest has focussed on bichromatic driving fields, both theoretically [1–4] and experimentally [5–8], of both equal and unequal intensities, both symmetrically and asymmetrically detuned from the atomic transition frequency. In all cases to date, however, the splitting of both energy levels and spectral features has resulted from the coupling of pairs of atom-field states by a one-photon atom-field interaction. We refer to this henceforth as the “one-photon AC Stark effect”.

© 1996 Optical Society of America