Abstract
A possible mechanism of surface light-induced drift (SLID) under velocity-selective excitation arising from the roughness of the cell wall surface is discussed here both qualitatively and quantitatively. Due to the backscattering from the facets of roughness SLID can arise even when scattering is completely locally diffusive. It provides significant widening of the scope of real physical situations where SLID can occur. This mechanism can basically explain the unexpected sign of SLID observed in recent experiments [Phys. Rev. Lett. 59, 447 (1987); Phys. Rev. A 42, 6471 (1990)]. As a method to study gas-surface interactions, SLID should be combined with some technique providing study of the surface topography.
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