Scientific Results

Analytical approximations of the dispersion relation of a linear chain of metal nanoparticles

Year: 2011

Authors: Guasoni M., De Angelis C.

Autors Affiliation: Dipartimento di Ingegneria dell’Informazione and Consorzio Interuniversitario per le Scienze Fisiche della Materia, Universit√† di Brescia, via Branze 38, Brescia 25123, Italy

Abstract: We find some useful analytical approximations of the dispersion relation of a linear chain of metal nanoparticles in the subwavelength limit where the dipolar approximation can be used. We also approximate the group velocity without a direct estimation of the derivative of the dispersion relation, that carries unavoidable error amplifications. In the end we use these results in order to get some simple recipes that evaluate the sensitivity of the dispersion relation and the propagation losses with respect to the main parameters of the chain. (C) 2010 Elsevier B.V. All rights reserved.

Journal/Review: OPTICS COMMUNICATIONS (PRINT)

Volume: 284 (7)      Pages from: 1822  to: 1827

KeyWords: surface plasmon polariton
DOI: 10.1016/j.optcom.2010.11.082

Citations: 2
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English