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Proceedings Paper

Interfacial reflection enhanced optical extinction and thermal dynamics in polymer nanocomposite films
Author(s): Jeremy R. Dunklin; Gregory T. Forcherio; Keith R. Berry Jr.; D. Keith Roper
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Paper Abstract

Polymer films containing plasmonic nanostructures are of increasing interest for development of responsive energy, sensing, and therapeutic systems. A series of novel gold nanoparticle (AuNP)-polydimethylsiloxane (PDMS) films were fabricated to elucidate enhanced optical extinction from diffractive and scattering induced internal reflection. AuNPs with dramatically different scattering-to-absorption ratios were compared at variable interparticle separations to differentiate light trapping from optical diffraction and Mie scattering. Description of interfacial optical and thermal effects due to these interrelated contributions has progressed beyond Mie theory, Beer’s law, effective media, and conventional heat transfer descriptions. Thermal dissipation rates in AuNP-PDMS with this interfacial optical reflection was enhanced relative to films containing heterogeneous AuNPs and a developed thermal dissipation description. This heuristic, which accounts for contributions of both internal and external thermal dissipations, has been shown to accurately predict thermal dissipation rates from AuNP-containing insulating and conductive substrates in both two and three-dimensional systems. Enhanced thermal response rates could enable design and adaptive control of thermoplasmonic materials for a variety of implementations.

Paper Details

Date Published: 16 September 2016
PDF: 8 pages
Proc. SPIE 9919, Nanophotonic Materials XIII, 99190X (16 September 2016); doi: 10.1117/12.2238040
Show Author Affiliations
Jeremy R. Dunklin, Univ. of Arkansas (United States)
Gregory T. Forcherio, Univ. of Arkansas (United States)
Keith R. Berry Jr., Univ. of Arkansas (United States)
D. Keith Roper, Univ. of Arkansas (United States)

Published in SPIE Proceedings Vol. 9919:
Nanophotonic Materials XIII
Stefano Cabrini; Gilles Lérondel; Adam M. Schwartzberg; Taleb Mokari, Editor(s)

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