We explore the electrodynamic coupling between a plane wave and an infinite two-dimensional periodic lattice of magnetoelectric point scatterers, deriving a semianalytical theory with consistent treatment of radiation damping, retardation, and energy conservation. We apply the theory to arrays of split ring resonators and provide a quantitative comparison of measured and calculated transmission spectra at normal incidence as a function of lattice density, showing excellent agreement. We further show angle-dependent transmission calculations for circularly polarized light and compare with the angle-dependent response of a single split ring resonator, revealing the importance of cross coupling between electric dipoles and magnetic dipoles for quantifying the pseudochiral response under oblique incidence of split ring lattices.

Phys. Rev. B
Resonant Nanophotonics

Lunnemann, P, Šersić, I, & Koenderink, A.F. (2013). Optical properties of two-dimensional magnetoelectric point scattering lattices. Phys. Rev. B, 88(24, Article number: 245109), 1–9. doi:10.1103/PhysRevB.88.245109