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Optical properties of a metalo-dielectric nanocomposite: Small gold spherical nanoparticles in a cylindrical di-block copolymer
, Article European Physical Journal B ; Volume 86, Issue 4 , 2013 ; 14346028 (ISSN) ; Rahimi, L ; Bahrampour, A. R ; Pepe, G. P ; Sharif University of Technology
2013
Abstract
In this paper, the well-known effective medium approximation (EMA) and coupled dipole approximation (CDA) methods are employed to study the optical properties of a metal nanoparticle-block copolymer (MNP-BCP) nanocomposite. This approach is applied to study a system consisting of small gold spherical nanoparticles randomly distributed in the cylindrical micelles of a di-BCP. At first, the EMA method is used to obtain the effective dielectric function of a semi-metallic cylinder. Then, the extinction spectrum of the hexagonal 2D-array of semi-metallic cylinders is obtained by the CDA method. This procedure makes it possible to study simultaneously both the electromagnetic extinction of MNPs...