## Finite-Difference Time-Domain Solution of Light Scattering by Dielectric Particles with Large Complex Refractive Indices

Applied Optics, Vol. 39, Issue 30, pp. 5569-5578 (2000)

http://dx.doi.org/10.1364/AO.39.005569

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### Abstract

The finite-difference time-domain (FDTD) technique is examined for its suitability for studying light scattering by highly refractive dielectric particles. It is found that, for particles with large complex refractive indices, the FDTD solution of light scattering is sensitive to the numerical treatments associated with the particle boundaries. Herein, appropriate treatments of the particle boundaries and related electric fields in the frequency domain are introduced and examined to improve the accuracy of the FDTD solutions. As a result, it is shown that, for a large complex refractive index of 7.1499 + 2.914<i>i</i> for particles with size parameters smaller than 6, the errors in extinction and absorption efficiencies from the FDTD method are generally less than ~4%. The errors in the scattering phase function are less than ~5%. We conclude that the present FDTD scheme with appropriate boundary treatments can provide a reliable solution for light scattering by nonspherical particles with large complex refractive indices.

© 2000 Optical Society of America

**OCIS Codes**

(010.1290) Atmospheric and oceanic optics : Atmospheric optics

(010.1310) Atmospheric and oceanic optics : Atmospheric scattering

(010.3920) Atmospheric and oceanic optics : Meteorology

(280.1100) Remote sensing and sensors : Aerosol detection

(290.1090) Scattering : Aerosol and cloud effects

(290.5850) Scattering : Scattering, particles

**Citation**

Wenbo Sun and Qiang Fu, "Finite-Difference Time-Domain Solution of Light Scattering by Dielectric Particles with Large Complex Refractive Indices," Appl. Opt. **39**, 5569-5578 (2000)

http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-30-5569

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