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Figure 6 | Nanoscale Research Letters

Figure 6

From: Free-field characterization via directional transmission through a nanoaperture

Figure 6

Transmission efficiency. (a) Variation of the zero-order efficiency η0 (red line, left-hand scale) and the total transmission efficiency η (black line, right-hand scale) as a function of the Al film thickness h. (b) Angular dependence of transmission efficiency: surface corrugation optimized for SPP coupling (green line), the final design without (blue line) and with (black line) the TiO2 layers.

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