This work was supported in part by the National Science Foundation.
Laser beams -- Scattering, Electrons -- Scattering -- Mathematical models
This paper deals with the problem of the scattering of focused laser beams by tenuous particles using an iterative technique. The results are shown to be accurate provided that (a) the polarizability of the particle medium is small and (b) the phase shift of the central ray is less than 2. It was found that when the size of the incident beam waist is close to that of the scatterer, the scattered field deviates significantly from that for the incident plane wave case. Specific examples are given.
S. Colak, C. Yeh, L. W. Casperson . Scattering of focused beams by tenuous particles. Applied Optics, Volume 18, Number 3 (February 1979), pp. 294-302.