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Phys. Rev. B 75, 045439 (2007) [4 pages]

Self-consistent determination of plasmonic resonances in ternary nanocomposites

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Hernando Garcia*
Department of Physics, Southern Illinois University, Edwardsville, Illinois 62026, USA

Justin Trice and Ramki Kalyanaraman†
Department of Physics, Washington University, St. Louis, Missouri 63130, USA and Center for Materials Innovation, Washington University, St. Louis, Missouri 63130, USA

Radhakrishna Sureshkumar‡
Department of Energy, Environmental and Chemical Engineering, Washington University, St. Louis, Missouri 63130, USA and Center for Materials Innovation, Washington University, St. Louis, Missouri 63130, USA

Received 15 December 2006; published 31 January 2007

We have developed a self-consistent technique to predict the behavior of plasmon resonances in multicomponent systems as a function of wavelength. This approach, based on the tight lower bounds of the Bergman-Milton formulation, is able to predict optical data, including the positions, shifts, and shapes of plasmonic peaks in ternary nanocomposites without using any fitting parameters. We obtained excellent predictions of the experimental data for mixtures of Ag:Cu:SiO2 and alloys of Au-Cu:SiO2 and Ag-Au:H2O. The essential physics of plasmonic behavior is captured by this approach.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.75.045439
DOI:
10.1103/PhysRevB.75.045439
PACS:
78.67.−n, 77.22.−d, 77.84.Lf, 81.07.−b

*Electronic address: hgarcia@siue.edu

†Electronic address: ramkik@wuphys.wustl.edu

‡Electronic address: suresh@che.wustl.edu

 
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