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Reflection from Irregular Array of Silver Nanoparticles on Multilayer Substrate

Authors:
Victor Ovchinnikov

Keywords: Ag nanoparticle; surface plasmon resonance; reflectance; extinction; irregular array

Abstract:
Reflection from silver irregular arrays of nanostructures on quartz and oxidized silicon substrates is studied. It is shown that localized plasmon resonances in reflectance spectra cannot be easily identified by their peaks like it is done in case of extinction spectra. To clarify positions of resonances optical properties of samples are analyzed in relation to their design and morphology. Extinction and reflection from as prepared, plasma etched and SiO2 covered samples are compared. It is concluded that coupling between nanoparticles, phase shift of scattered light and reflection from film interfaces lead to additional features in reflectance spectra in comparison with extinction ones. Recommendations for identification of plasmon resonances in reflectance spectra are proposed.

Pages: 16 to 21

Copyright: Copyright (c) IARIA, 2015

Publication date: August 23, 2015

Published in: conference

ISSN: 2308-3530

ISBN: 978-1-61208-431-2

Location: Venice, Italy

Dates: from August 23, 2015 to August 28, 2015