Figure 4
(a) Transmission spectra of the slit; without (green) and with matched zero-index meta-atom array of (blue) high index (ε1, ε2) = (14.53, 179.2) and (red) low index (2.22, 12.96) materials. f0 is the frequency of matched zero index. (b,c) Ex field pattern near the nanoslit at f0; (b) with and (c) without the zero-index meta-atom array. The near field pattern shows the associated dramatic enhancement of the electric field with the coating of matched zero index meta-atoms. (d–f) Hz field pattern of the slit at f0 (d) without, (e) with high-index, and (f) with low-index meta-atom array. Slit width; 0.21λ (d,e) and 0.55λ (f).
