Table 1. EOT Calculated from the Measured Transmission with Different Gap Widths.
| gap width (nm) | measured transmission (%) | open area fraction (%) | area-normalized transmission (%) |
|---|---|---|---|
| 10 | 36 | 3.06 | 1170 |
| 7 | 25 | 2.28 | 1090 |
| 4 | 15 | 1.35 | 1120 |
| 2 | 12 | 0.69 | 1740 |
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