Abstract
We simulate the light transmission through an extremely small nanoscale aperture having a 10 nm diameter punctured in a metal film positioned at the center of a plasmonic bull’s eye grating. A considerable directive emission of transmitted light with a divergence angle of 5.7 degrees was observed at 10 μm from the nanohole opening at the frequency of surface plasmon polariton excitation, an confirmed by measuring the distance dependent transmission amplitude. Observations of the electric field in cross-sectional, near-field, and far-field views near-field enhancement associated with the surface plasmon excitation, and the interference of the electric field light through the nanohole in the near-field region is responsible for such a considerable directive emission.
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Kim, G.W., Ko, JH., Park, D.J. et al. Surface-Plasmon Assisted Transmission Through an Ultrasmall Nanohole of ~ 10 nm with a Bull’s Eye Groove. J. Korean Phys. Soc. 73, 1698–1702 (2018). https://doi.org/10.3938/jkps.73.1698
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DOI: https://doi.org/10.3938/jkps.73.1698