D. Livdan et Aa. Lisyansky, DIFFUSION OF CLASSICAL WAVES IN RANDOM-MEDIA WITH MICROSTRUCTURE RESONANCES, Journal of the Optical Society of America. A, Optics, image science,and vision., 13(4), 1996, pp. 844-850
The diffusion constant of classical waves propagating in random media
with microstructure resonances is obtained. Renormalizations of D that
are due to expansions in transferred momentum q and frequency omega i
n the Bethe-Salpeter equation are taken into account. The diffusion co
nstant is estimated for scalar waves propagating in the medium with ra
ndomly distributed dielectric spheres with the use of the nondiagonal
off-shell transition matrix for penetrable scatterers. A detailed comp
arison of different sources of renormalization is made. Differences be
tween previous calculations based on the on-shell scattering matrix an
d new results implementing the off-shell scattering matrix are discuss
ed. (C) 1996 Optical Society of America