Abstract

The localized model of the beam-shape coefficients for Gaussian beam-scattering theory by a spherical particle provides a great simplification in the numerical implementation of the theory. We derive an alternative form for the localized coefficients that is more convenient for computer computations and that provides physical insight into the details of the scattering process. We construct a fortran program for Gaussian beam scattering with the localized model and compare its computer run time on a personal computer with that of a traditional Mie scattering program and with three other published methods for computing Gaussian beam scattering. We show that the analytical form of the beam-shape coefficients makes evident the fact that the excitation rate of morphology-dependent resonances is greatly enhanced for far off-axis incidence of the Gaussian beam.

© 1995 Optical Society of America

Interpretation of extinction in Gaussian-beam scattering

James A. Lock
J. Opt. Soc. Am. A 12(5) 929-938 (1995)

Forward scattering of a Gaussian beam by a nonabsorbing sphere

J. T. Hodges, G. Gréhan, G. Gouesbet, and C. Presser
Appl. Opt. 34(12) 2120-2132 (1995)

Contribution of high-order rainbows to the scattering of a Gaussian laser beam by a spherical particle

James A. Lock
J. Opt. Soc. Am. A 10(4) 693-706 (1993)

Partial-wave representations of laser beams for use in light-scattering calculations

Gérard Gouesbet, James A. Lock, and Gérard Gréhan
Appl. Opt. 34(12) 2133-2143 (1995)

Improved algorithm for electromagnetic scattering of plane waves and shaped beams by multilayered spheres

Zhen Sen Wu, Li Xin Guo, Kuan Fang Ren, Gérard Gouesbet, and Gérard Gréhan
Appl. Opt. 36(21) 5188-5198 (1997)