Abstract

Scalar and tensor polarizabilities of cesium 5f and 7d states were measured by three-color multiphoton excitation techniques. The low field results were quadratic and were in good agrement with calculated values. At higher electric fields, we clearly resolved Autler-Townes avoided crossings between 5f levels and dressed 7d states. The observed doublet component separations scaled linearly with Rabi frequency for the 7d—5f transitions, supporting a two-level model for the four-level experiment. The results are interesting because the observed spectra were independent of Rabi frequencies for the 6s—6p and 6p—7d transitions. Angular momentum forbidden transitions from 7d, J_z = 1/2 to 5f, J_z = 5/2 were observed at higher dc fields. These are attributed to dc field-induced mixing between nearly degenerate 5f and 5g states.

© 1986 Optical Society of America