Accession Number:

ADA222758

Title:

Wavelength-Dependent Refractive and Absorptive Terms for Propagation in Small-Spaced Correlated Distributions

Descriptive Note:

Corporate Author:

ILLINOIS UNIV AT CHICAGO CIRCLE DEPT OF MATHEMATICS

Personal Author(s):

Report Date:

1983-11-01

Pagination or Media Count:

6.0

Abstract:

Earlier results for coherent propagation of light in correlated random distributions of dielectric particles of radius a with minimum separation b or 2a small compared with wavelength lambda 2 pvk are generalized to obtain the refractive and absorptive terms to order ka-sq. The present results include the earlier multiple scattering by electric dipoles as well as scattering and multipole coupling by magnetic dipoles and electric quadrupoles. The correlation aspects are determined by the statistical-mechanics radial distribution function fR for impenetrable particles of diameter b. The new terms of slab scatterers and spheres involve the integral of fR first moment or of f 1n R for cylinders. The new packing factor is evaluated exactly for slabs as a simple algebraic function of the volume fraction w, and it is shown that the bulk index of refraction reduces to that of one particle in the limit w 1. A similar result is achieved for spheres for spares in terms of the Percus-Yevick approximation and the unrealizable limit w 1. jhd

Subject Categories:

  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE