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Proceedings Paper

Is it possible to assess spatial correlations in a system of polarizable particles by measuring its optical response?
Author(s): Rui M. S. Pereira; Paulo Pereira; Georgi Smirnov; Mikhail Vasilevskiy
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Paper Abstract

Optical response of a system of (nearly) identical polarizable particles, coupled by electromagnetic interactions is studied theoretically addressing the following question: Is it possible to extract information concerning the spatial correlations in the particles' positions from the experimentally measurable optical response of the system? The relation between the spectral-dependent solutions of the coupled-dipole equations and the type and parameters of the particle-particle correlation function in real space is analyzed. The physical system considered is a collection of metallic nanoparticles distributed over a square or cubic lattice in a random-correlated way, relevant to metaldielectric composites interesting for nanoplasmonics. We show that it is possible to propose a numerical criterium that allows for conclusion concerning the degree of correlation in the particle positions using the (experimentally measurable) extinction spectrum of the system.

Paper Details

Date Published: 26 July 2011
PDF: 7 pages
Proc. SPIE 8001, International Conference on Applications of Optics and Photonics, 80013M (26 July 2011); doi: 10.1117/12.892194
Show Author Affiliations
Rui M. S. Pereira, Univ. do Minho (Portugal)
Paulo Pereira, Univ. do Minho (Portugal)
Georgi Smirnov, Univ. do Minho (Portugal)
Mikhail Vasilevskiy, Univ. do Minho (Portugal)

Published in SPIE Proceedings Vol. 8001:
International Conference on Applications of Optics and Photonics
Manuel Filipe Costa, Editor(s)

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