Chiral plasmonic nanocrescents: large-area fabrication and optical properties

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DOI

Large-area arrays of substrate-supported plasmonic gold crescents are fabricated by using the new colloidal lithography technique, which is based on an in situ-deposited silica resistance layer. The method provides the means to control the particles' asymmetry just by changing the mutual deposition angle of gold and silica. Asymmetric crescent structures exhibit a pronounced circular dichroism in near-infrared region, with the chiral asymmetry factor reaching 0.2. According to the simulation, the optical chirality enhancement reaches between one and two orders of magnitude and is localized near the crescents' tips. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Original languageEnglish
JournalOptics Express
Volume26
Issue21
Pages (from-to)27101-27108
Number of pages8
ISSN1094-4087
DOIs
Publication statusPublished - 15 Oct 2018

    Research areas

  • COLLOIDAL LITHOGRAPHY, NANOSPHERE LITHOGRAPHY, LOW-COST, METAMATERIALS, NANOSTRUCTURES, NANORINGS, SURFACES, ANTENNA, SHAPE

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