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Finite-difference time-domain solution of light scattering by dielectric particles with a perfectly matched layer absorbing boundary condition

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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

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Corrections

Wenbo Sun, "Permittivity in the finite-difference time-domain equations and maximum conductivity in the perfectly matched layer absorbing boundary conditions: erratum," Appl. Opt. 45, 2843-2843 (2006)
https://opg.optica.org/ao/abstract.cfm?uri=ao-45-12-2843

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