TY - JOUR

T1 - On Light Scattering by Two-Layer Ellipsoids with Nonconfocal Boundaries

AU - Il'in, V. B.

AU - Farafonov, V. G.

AU - Prokopjeva, M. S.

AU - Ustimov, V. I.

N1 - Publisher Copyright: © 2020, Pleiades Publishing, Ltd.

PY - 2020/8/1

Y1 - 2020/8/1

N2 - Abstract: We consider new approaches to the calculation of the optical properties of small nonspherical layered particles whose layer boundaries are nonconfocal concentric coaxial ellipsoids. A simple analytical approximation is proposed and substantiated for the case in which the size of these particles is much smaller than the wavelength of the incident radiation. The approximation is found to yield results with an error of ~3 × 10 –3 for the diffraction parameter x < 0.1. An approach to the calculation of the optical properties of nonconfocal ellipsoids is justified, which consists of the replacement of nonconfocal boundaries with confocal ones, with the layer volumes being preserved. We show that the error of this approach for dielectric particles is a few percent at x < 1 and about 20% at x < 5. It is noted that both approximations can be easily extended to the case of multilayer nonconfocal ellipsoids.

AB - Abstract: We consider new approaches to the calculation of the optical properties of small nonspherical layered particles whose layer boundaries are nonconfocal concentric coaxial ellipsoids. A simple analytical approximation is proposed and substantiated for the case in which the size of these particles is much smaller than the wavelength of the incident radiation. The approximation is found to yield results with an error of ~3 × 10 –3 for the diffraction parameter x < 0.1. An approach to the calculation of the optical properties of nonconfocal ellipsoids is justified, which consists of the replacement of nonconfocal boundaries with confocal ones, with the layer volumes being preserved. We show that the error of this approach for dielectric particles is a few percent at x < 1 and about 20% at x < 5. It is noted that both approximations can be easily extended to the case of multilayer nonconfocal ellipsoids.

KW - light scattering

KW - layered particles

KW - Rayleigh approximation

UR - https://link.springer.com/article/10.1134%2FS0030400X20080147

UR - http://www.scopus.com/inward/record.url?scp=85091157874&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/79f61188-b3d9-3e4c-96be-bff6bc342d98/

U2 - 10.1134/S0030400X20080147

DO - 10.1134/S0030400X20080147

M3 - Article

VL - 128

SP - 1167

EP - 1173

JO - OPTICS AND SPECTROSCOPY

JF - OPTICS AND SPECTROSCOPY

SN - 0030-400X

IS - 8

ER -