Quantum-mechanical and quasiclassical scattering of molecules in a non
perturbative laser field are studied. Analytical expressions for the o
bservables of interest in laser-induced focusing and guiding of molecu
les are derived that span the quantal-to-classical energy regime and t
he weak-to-strong interaction range. General conclusions regarding the
problem of two-dimensional quantum-mechanical scattering are drawn. (
C) 1998 American Institute of Physics. [S0021-9606(98)01713-9].