Surface light-induced drift due to anisotropic gas-surface scattering in models with and without boundary conditions

Abstract

Surface light-induced drift (SLID), which occurs under velocity-selective excitation due to the state-dependence of the probability of trapping or chemisorption, has demonstrated its extreme sensitivity in studying the state-specificity of gas-surface interactions. Contrary to an intuitive perception, SLID can be also used to obtain the information on the angular dependence of the gas-surface scattering. In this paper we describe this effect qualitatively and then analyze it in two different models, with and without boundary conditions. We also discuss the implications of the results for studying the scaling laws of the angular dependence of surface scattering by the SLID technique. PACS No. 34.50.Rk