Recently there have been significant interests about fabrication of optical nanopore for single molecule analysis and manipulation. However, due to very small amount of the optical intensity through the tiny size of the nano-aperture, optical intensity enhancement via plasmonic effect by using pore array or periodic groove patterns have been tried. In addition, the double slits with nanoscale width is reported to provide the constructive interference of the surface plasmonic wave. In this report, the nanoscale double slits with Au aperture array has been fabricated and optically characterized.

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Seong Soo Choi, Sae-Joong Oh, Hyun Tae Kim, Soo Bong Choi, and Byung Seong Bae, "Fabrication of plasmonic nano-aperture array with nanoscale double slits for single molecule analysis," Proc. SPIE 10894, Plasmonics in Biology and Medicine XVI, 1089410 (Presented at SPIE BiOS: February 05, 2019; Published: 7 March 2019); https://doi.org/10.1117/12.2505886.