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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 5 — Feb. 28, 2011
  • pp: 4673–4691

Light scattering and absorption by randomly-oriented cylinders: dependence on aspect ratio for refractive indices applicable for marine particles

Howard R. Gordon  »View Author Affiliations


Optics Express, Vol. 19, Issue 5, pp. 4673-4691 (2011)
http://dx.doi.org/10.1364/OE.19.004673


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Abstract

Typically, explanation/interpretation of observed light scattering and absorption properties of marine particles is based on assuming a spherical shape and homogeneous composition. We examine the influence of shape and homogeneity by comparing the optics of randomly-oriented cylindrically-shaped particles with those of equal-volume spheres, in particular the influence of aspect ratio (AR = length/diameter) on extinction and backscattering. Our principal finding is that the when AR > ~3–5 and the diameter is of the order of the wavelength, the extinction efficiency and the backscattering probability are close to those of an infinite cylinder. In addition, we show the spherical-based interpretation of extinction and absorption can lead to large error in predicted backscattering.

© 2011 OSA

OCIS Codes
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(010.1030) Atmospheric and oceanic optics : Absorption

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: December 21, 2010
Revised Manuscript: February 13, 2011
Manuscript Accepted: February 18, 2011
Published: February 24, 2011

Virtual Issues
Vol. 6, Iss. 3 Virtual Journal for Biomedical Optics

Citation
Howard R. Gordon, "Light scattering and absorption by randomly-oriented cylinders: dependence on aspect ratio for refractive indices applicable for marine particles," Opt. Express 19, 4673-4691 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-5-4673


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