The discrete dipole approximation (DDA) has been widely used to study light scattering by nonmagnetic objects. The electric field inside an arbitrary scatterer is found by solving a dense, symmetric, linear system using, in general, an iterative approach. However, when the scatterer has a nonzero magnetic susceptibility, the linear system becomes nonsymmetric, and some of the most commonly used iterative methods fail to work. We study the scattering of light by objects with both electric and magnetic linear responses and discuss the efficiency of several iterative solvers for the nonsymmetric DDA.
© 2009 Optical Society of America
Original Manuscript: December 16, 2008
Manuscript Accepted: January 30, 2009
Published: March 18, 2009
Patrick C. Chaumet and Adel Rahmani, "Efficient iterative solution of the discrete dipole approximation for magnetodielectric scatterers," Opt. Lett. 34, 917-919 (2009)