Optical Properties of Microparticle Suspensions
Abstract
Suspensions of microparticles in a liquid host medium are known to possess very large optical nonlinearity (large chi^3), whilst also exhibiting the unusual phenomenon of enhanced backscattering. We have for the first experimentally studied the relationship between these two effects using wavelengthscale latex spheres in aqueous solutions. The experiment shows the change in the halfpower angular width of the enhanced backscattering peak varies as 1/sqrt{ rm I} where I is the intensity of the illuminating radiation. A numerical model based on the diffusion approximation is developed to explain these results. It qualitatively agrees with the experimental results except a higher illuminating intensity is required in the model to induce a similar change of the angular width of the enhanced backscattering peak observed experimentally.
 Publication:

Ph.D. Thesis
 Pub Date:
 1993
 Bibcode:
 1993PhDT.......155K
 Keywords:

 BACKSCATTERING;
 ILLUMINATING RADIATION;
 Physics: Optics