A generalization of the coupled-dipole method introduced by PurcellPennypacker [Astrophys. J. 186, 705 (1973)], a low-frequency method used to describe electromagnetic scattering by dielectric objects of arbitrary shape, is proposed. At each site of the cubic lattice, instead of a dipole moment there are an electric dipole, a magnetic dipole, and an electric quadrupole, leading to an improved description of the scattered fields.
© 1997 Optical Society of America
Original Manuscript: March 11, 1996
Revised Manuscript: August 26, 1996
Manuscript Accepted: May 28, 1996
Published: February 1, 1997
Thierry Lemaire, "Coupled-multipole formulation for the treatment of electromagnetic scattering by a small dielectric particle of arbitrary shape," J. Opt. Soc. Am. A 14, 470-474 (1997)