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Extraordinary optical transmission in nanopatterned ultrathin metal films without holes

TitleExtraordinary optical transmission in nanopatterned ultrathin metal films without holes
Publication TypeJournal Article
Year of Publication2016
AuthorsPeera, A, Biswas, R
JournalNanoscale
Volume8
Pagination4657-4666
Date Published02
Type of ArticleArticle
ISBN Number2040-3364
Accession NumberWOS:000371117900031
Keywordsarrays, diffraction, enhanced raman-scattering, light, surface-relief gratings
Abstract

100 within the nanocup, and similar to 40 in the ultrathin gold layer causing transmission through it. We show a wavelength red-shift of similar to 30 nm in the extraordinary transmission peak when the nanocups are coated with a thin film of a few nanometers, which can be utilized for biosensing. The continuous corrugated metal films are far simpler structures to observe extraordinary transmission, circumventing the difficult process of etching the metal film. Such continuous metal films with ultrathin regions are simple platforms for non-linear optics, plasmonics, and biological and chemical sensing.

DOI10.1039/c5nr07903a
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Photonics