RESONANCE FLUORESCENCE OF A 2-LEVEL ATOM IN A STRONG BICHROMATIC FIELD

An experiment was performed recently [Y. Zhu, A. Lezama, Q. Wu, and T. W. Mossberg (unpublished)] in which a two-level atom of transition frequency was placed in a bichromatic laser field with frequencies of sufficient intensity to produce dynamic Stark splitting. The observed fluorescence spectrum differed qualitatively in almost all its details from the well-known Mollow triplet [B. R. Mollow, Phys. Rev. 188, 1969 (1969)]. In this article, we use a dressed-atom model to explain the observed results. © 1990 The American Physical Society.