Publication Abstracts

Mishchenko and Dlugach 2018

Mishchenko, M.I., and J.M. Dlugach, 2018: Scattering and extinction by spherical particles immersed in an absorbing host medium. J. Quant. Spectrosc. Radiat. Transfer, 211, 179-187, doi:10.1016/j.jqsrt.2018.03.001.

Many applications of electromagnetic scattering involve particles immersed in an absorbing rather than lossless medium, thereby making the conventional scattering theory potentially inapplicable. To analyze this issue quantitatively, we employ the FORTRAN program developed recently on the basis of the first-principles electromagnetic theory to study far-field scattering by spherical particles embedded in an absorbing infinite host medium. We further examine the phenomenon of negative extinction identified recently for monodisperse spheres and uncover additional evidence in favor of its interference origin. We identify the main effects of increasing the width of the size distribution on the ensemble-averaged extinction efficiency factor and show that negative extinction can be eradicated by averaging over a very narrow size distribution. We also analyze, for the first time, the effects of absorption inside the host medium and ensemble averaging on the phase function and other elements of the Stokes scattering matrix. It is shown in particular that increasing absorption significantly suppresses the interference structure and can result in a dramatic expansion of the areas of positive polarization. Furthermore, the phase functions computed for larger effective size parameters can develop a very deep minimum at side-scattering angles bracketed by a strong diffraction peak in the forward direction and a pronounced backscattering maximum.

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BibTeX Citation

  author={Mishchenko, M. I. and Dlugach, J. M.},
  title={Scattering and extinction by spherical particles immersed in an absorbing host medium},
  journal={Journal of Quantitative Spectroscopy and Radiative Transfer},

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RIS Citation

ID  - mi00420g
AU  - Mishchenko, M. I.
AU  - Dlugach, J. M.
PY  - 2018
TI  - Scattering and extinction by spherical particles immersed in an absorbing host medium
JA  - J. Quant. Spectrosc. Radiat. Transfer
JO  - Journal of Quantitative Spectroscopy and Radiative Transfer
VL  - 211
SP  - 179
EP  - 187
DO  - 10.1016/j.jqsrt.2018.03.001
ER  -

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