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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 6 — Mar. 15, 2014
  • pp: 1701–1704

Morphology-dependent resonances of spherical droplets with numerous microscopic inclusions

Michael I. Mishchenko, Li Liu, and Daniel W. Mackowski  »View Author Affiliations


Optics Letters, Vol. 39, Issue 6, pp. 1701-1704 (2014)
http://dx.doi.org/10.1364/OL.39.001701


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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.

© 2014 Optical Society of America

OCIS Codes
(260.5740) Physical optics : Resonance
(290.0290) Scattering : Scattering
(290.4020) Scattering : Mie theory
(290.4210) Scattering : Multiple scattering
(290.5850) Scattering : Scattering, particles

ToC Category:
Scattering

History
Original Manuscript: February 4, 2014
Manuscript Accepted: February 12, 2014
Published: March 14, 2014

Virtual Issues
Vol. 9, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Michael I. Mishchenko, Li Liu, and Daniel W. Mackowski, "Morphology-dependent resonances of spherical droplets with numerous microscopic inclusions," Opt. Lett. 39, 1701-1704 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-6-1701


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