*et al.* [@Husnik08], and (B) they fit well to our transmission data on arrays of different densities of split rings taken at normal incidence [@Sersic09] and as a function of incidence angle [@Sersictopublish]. The chosen values correspond to on-resonance polarizabilities $\alpha_{EE}= 4.6 V$, $\alpha_{HH}=2.1V$ and $\alpha_{EH}=2.5 V$, all well in excess of the physical SRR volume $V$ as is typical for strong scatterers. Finally, we note that the calculated albedo fits well to the albedo $a=0.5$ to $0.75$ calculated by FDTD by Husnik et al. [@Husnik08].

Radiation patterns and eigenvectors of the polarizability tensor
----------------------------------------------------------------

In Fig.  \[Fig1:radpats\], we consider the eigenstates of the split ring polarizability tensor presented in Eq. (\[Eq:SRRradiationdamp\]). We first assume that the cross coupling terms are absent, i.e., $\eta_C=0$, in which case the polarizability tensor is diagonal, with eigenpolarizabilities $\alpha(\omega) \eta_E$ and $\alpha(\omega)\eta_H$. The corresponding orthogonal eigenmodes are $(p_x,m_z)=(1,0)$ and $(p_x,m_z)=(0,1)$. Figures  \[Fig1:radpats\] (b) and (c) show radiation patterns of the two eigenmodes. Figure  \[Fig1:radpats\](b) shows the radiation pattern of the purely electric eigenmode $(p_x,m_z)=(1,0)$ and Fig.  \[Fig1:radpats\](c) shows the radiation pattern of the purely magnetic eigenmode $(p_x,m_z)=(0,1)$. Note that both $\bm{p}_x$ and $\bm{m}_z$ radiate as simple dipoles with a $\sin^2\theta$ far field radiation pattern 