Multiphoton dynamics and resonance lineshapes in three-level systems: Many-mode Floquet treatment
Journal
Journal of Physics B: Atomic and Molecular Physics
Journal Volume
18
Journal Issue
23
Pages
4539-4556
Date Issued
1985
Author(s)
Abstract
The authors present an exact treatment of two- and multiquantum transitions in three-level systems driven by two intense linearly polarised monochromatic fields based on the semiclassical many-mode Floquet theory developed recently. Further they extend the almost degenerate perturbation theory of Salwen (1955-6) to the two-mode Floquet Hamiltonian and obtain approximate analytical formulae for multiphoton transition probabilities, resonance bichromatic shifts and widths, and absorption lineshapes beyond the conventional rotating-wave approximation (RWA). Detailed comparison of the analytical, the RWA, and the exact results is given. Several novel features of multiphoton lineshape characteristics are pointed out.
Type
journal article