In plasmonics, inter-gap distance or plasmonic nanogap is critical to influence LSPR or near field properties. Applications doesnt only limit to plasmonics, but can expanded to meta-surface and other photonic applications. Which fabrication approach can be beneficial? It should consider all the below factors:
1) Low-cost method
2) Highly ordered structure
3) Reproducible
3) Uniformity
4) simplicity in fabrication