Figure 1

(a) Refraction of TM waves at the interface between vacuum and the layered system. (b) Dispersion of a TM mode in a layered system; the system is isotropic in the $\{y,z\}$ plane; $v_g<0$ exists only in the $k_x$ direction. (c) $n_{\mathrm{eff}}=c/v_g$ of a TM mode from Ref. 1; FWLC data (solid curve) and exact results [2] (dashed curve); $\varphi =40°$ corresponds to (d); similar discrepancies are present in lossy media. (d) Identical to Fig. 2(c) from Ref. 1; circles represent intensity maxima; two black lines are of identical length; $(N_1\dots N_3)\simeq 5.3(N_1\dots N_2)\Rightarrow n\simeq 5.3$, inconsistent with Ref. 1 but in agreement with (c). (e) Diffraction-limited images of circular hole (dashed curve), linear slit (dashed-dotted curve), and linear (solid curve) sources.Reuse & Permissions