Self-Consistent Approach to Calculation of the Optical Response and Absorption Profiles of Thin Nanocomposite Films

Abstract

The absorption profiles for different nanocomposite thin films are calculated in the frame of approach based on a local-field method for calculations of optical properties of nanocomposite thin films having a matrix topology. The electrodynamic interactions between the inclusions as well as inclusions-matrix interactions are explicitly taken into account. It is shown that the absorption spectra are strongly dependent both on inclusions concentration and on materials the nanocomposite is made of. The dependences of the effective dielectric functions of different nanocomposites on type of inclusions, and their volume fraction are analyzed. The optical properties of thin nanocomposite films with different distributions of identical spherical inclusions along the film thickness are studied.

Plasmon Resonances for Biospecific Interactions Sensing

“…The self-consistency can be a method of taking into account the local field inhomogeneity. Such a self-consistent method of effective optical response calculation of the film is proposed in [31].…”

“…Then, number of the particles in zth layer is the function of z, and the function N(z)/S is in fact the distribution function of inclusions. The problem of finding the local field at any point inside the system and calculating the optical response to the external field is very similar to the calculation of the effective susceptibility for nanosystems considered in [31].…”

“…The averaging over the inclusion particles distribution of (3) gives the Fourier transform (in the plane of the film surface) of self-consistent local field in the system under consideration in the form (see details of the calculations in [31])…”