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Optical properties of high-density dispersions of particles: Application to intralipid solutions

Abstract:

We propose to study the scattering properties of dense distributions of spherical scatterers by resorting to an iterative solution of the Foldy–Twersky equation for the propagation of the coherent field. As a result of the first step of the iterative procedure, the host medium is substituted by an effective medium of complex refractive index to account for the multiple-scattering processes that occur among the particles. Although we truncate the above-mentioned iterative procedure to the second step, the results of our calculations are in excellent agreement with previous experimental results of Zaccanti et al. (“Measurement of optical properties of high-density media,” to be published in Applied Optics) for the scattering coefficient of Intralipid solutions up to a volume density of 15% and show a limited disagreement at a volume density of 22%. © 2003 Optical Society of America.