Two-color pulsed laser phase control in dipolar molecules: Rotating wave approximation versus exact results
A. Brown and W.J. Meath
Department of Chemistry, University of Western Ontario, London, Ontario, Canada N6A 5B7
Phuc Tran
Research Department, Code 4T4400D, Naval Air Warfare Center Weapons Division, China Lake, CA, 93555
Abstract
A rotating wave approximation (RWA) is developed to describe the interaction of a two-level system, which has permanent dipole moments, with two pulsed lasers. The RWA expressions for the time-dependent populations of the molecular states are applied to model laser-molecule interactions and tested by comparison with exact results. The results are used to discuss the pulsed laser phase control of molecular excitation through the interplay of competing one- and two-photon resonances involving the effects of a non-zero difference d between the permanent dipoles of the two states involved in the transition; the competition vanishes if d = 0.
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Last updated August 8, 2003.