Advanced Optical Materials Modified with Carbon Nano‐Objects

Abstract

Using different types of modern effective nanoparticles such as fullerenes, carbon nanotubes, shungites, graphene oxides, quantum dots, etc., the properties of organic and inorganic systems have been considered after applying nano-objects to modify the bulk and interface features of these systems. Some evidence of the nanostructures infl uence on the photorefractive, photoconductive, and dynamic characteristics of the organic conjugated materials with initial donor-acceptor interaction has been shown. A correlation between photorefractive and photoconductive characteristics has been found, and the mechanisms responsible for this correlation are discussed. Moreover, the spectral and mechanical properties of the inorganic compounds have been shown under the conditions of the nanoobjects modifi cation.

Refractive Properties of Conjugated Organic Materials Doped with Fullerenes and Other Carbon-Based Nano-Objects

“…In this case, the most important characteristic of the organic materials is the induced dipole, which can be expressed through dipole polarizability α (n) . [45] These are in turn related by the proportional dependence to the nonlinear susceptibility χ (n) [46][47][48][49][50] and to the local volume υ of the materials. By way of example, we consider a small local volume of our medium that is substantially smaller than the incident wavelengths of 532, 633, 1064, and 1540 nm in the basic experiments; for comparison, the fullerene molecule dimensions are 0.65 ± 0.7 nm.…”

“…It should be mentioned that the laser-induced change of the refractive index ∆n i has been calculated via Equation (1). It is based on the mathematical procedure shown in [47] and applied for the nano-doped organics in [48][49][50] via measurement of the diffraction efficiency (η) at the Raman-Nath diffraction conditions. The realization of the Raman-Nath diffraction conditions has been checked at spatial frequency (Λ), when Λ −1 ≥ d, and shows the best energy spread by the diffraction orders.…”