Chiral plasmonic nanocrescents: large-area fabrication and optical properties

Chiral plasmonic nanocrescents: large-area fabrication and optical properties

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 deposi...

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Veröffentlicht in:Optics express 2018-10, Vol.26 (21), p.27101-27108
Hauptverfasser: Bochenkov, Vladimir E, Sutherland, Duncan S
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description 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.
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title Chiral plasmonic nanocrescents: large-area fabrication and optical properties
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