title: Morphology-dependent resonances of spherical droplets with numerous microscopic inclusions.
abstract: We use the recently extended superposition T-matrix method to study the behavior of a sharp Lorenz-Mie resonance upon filling a spherical micrometer-sized droplet with tens and hundreds of randomly positioned microscopic inclusions. We show that as the number of inclusions increases, the extinction cross-section peak and the sharp asymmetry-parameter minimum become suppressed, widen, and move toward smaller droplet size parameters, while ratios of diagonal elements of the scattering matrix exhibit sharp angular features indicative of a distinctly nonspherical particle. Our results highlight the limitedness of the concept of an effective refractive index of an inhomogeneous spherical particle.
authors.forename: Michael I
authors.initials: MI
authors.lastname: Mishchenko
authors.forename: Li
authors.initials: L
authors.lastname: Liu
authors.forename: Daniel W
authors.initials: DW
authors.lastname: Mackowski