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Permittivity in Molecular Nanofilms

Published online by Cambridge University Press:  01 February 2011

Sinisa Vucenovic ,
Dusan Ilic ,
Jovan Setrajcic ,
Vjekoslav Sajfert  and
Dragoljub Mirjanic
Sinisa Vucenovic
Affiliation:
sina@inecco.net, Medical faculty, Department of Biophysics, Save Mrkalja 14, Banja Luka, N/A, Bosnia and Herzegovina
Dusan Ilic
Affiliation:
bora@if.ns.ac.yu, Faculty of technical sciences, University of Novi Sad, Novi Sad, 21000, Yugoslavia
Jovan Setrajcic
Affiliation:
bora@if.ns.ac.yu, Faculty of natural sciences, University of Novi Sad, Department of Physics, Novi Sad, N/A, Yugoslavia
Vjekoslav Sajfert
Affiliation:
vsajfert@ptt.yu, Technical faculty "Mihajlo Pupin", University of Novi Sad, Zrenjanin, 23000, Yugoslavia
Dragoljub Mirjanic
Affiliation:
anurs@blic.net, Medical faculty, University of Banja Luka, Banja Luka, 78000, Bosnia and Herzegovina
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Abstract

A microscopic theory of dielectrical properties of thin molecular films, i.e. quasi 2D systems bounded by two surfaces parallel to XY planes was formulated. Harmonic exciton states were calculated using the method of two-time, retarded, temperature dependent Green's functions. It has been shown that two types of excitations can occur: bulk and surface exciton states. Analysis of the optical properties of these crystalline systems for low exciton concentration shows that the permittivity strongly depends on boundary parameters and the thickness of the film. Conditions for the appearance of localized exciton states have been especially analyzed.

Keywords

filmdielectric propertiesnanoscale

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1017 , 2007 , 1017-DD08-29
Copyright
Copyright © Materials Research Society 2007

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