## Finite-Difference Time-Domain Solution of Light Scattering by Dielectric Particles with a Perfectly Matched Layer Absorbing Boundary Condition

Applied Optics, Vol. 38, Issue 15, pp. 3141-3151 (1999)

http://dx.doi.org/10.1364/AO.38.003141

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### Abstract

A three-dimensional finite-difference time-domain (FDTD) program has been developed to provide a numerical solution for light scattering by nonspherical dielectric particles. The perfectly matched layer (PML) absorbing boundary condition (ABC) is used to truncate the computational domain. As a result of using the PML ABC, the present FDTD program requires much less computer memory and CPU time than those that use traditional truncation techniques. For spheres with particle-size parameters as large as 40, the extinction and absorption efficiencies from the present FDTD program match the Mie results closely, with differences of less than ~1%. The difference in the scattering phase function is typically smaller than ~5%. The FDTD program has also been checked by use of the exact solution for light scattering by a pair of spheres in contact. Finally, applications of the PML FDTD to hexagonal particles and to spheres aggregated into tetrahedral structures are presented.

© 1999 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, Qiang Fu, and Zhizhang Chen, "Finite-Difference Time-Domain Solution of Light Scattering by Dielectric Particles with a Perfectly Matched Layer Absorbing Boundary Condition," Appl. Opt. **38**, 3141-3151 (1999)

http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-15-3141

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