Enhanced Optical Conductivity, Nonlinear Optical and Semiconducting Properties of Mg1−xCuxO/PMMA Nanocomposite

Abstract

Mg1−xCuxO/PMMA nanocomposite films (where x = 0.05, 0.1, 0.15 and 0.2) samples were prepared using solid state reaction technique. The values of both dispersion energy (Ed) and oscillating energy (Eo) were determined optically, which decreased with Cu content as a result of increasing the conductivity and carriers mobility’s with Cu, and also the free carrier concentration/effective mass (N/m*) decreased with Cu content. On the other hand, the first order of moment (M−1), the third order of moment (M−3) and static refractive index (no), were determined. The both of dielectric loss (e′) and dielectric tangent loss (e″) decreased with Cu, which increase the carriers mobility’s leading to decrease both of (e′) and (e″), on the other hand Cu ratio also increasing the mobility’s of carriers which increase both of real part of optical conductivity (σ1) and imaginary part of optical conductivity (σ2). The Linear optical susceptibility (χ(1)) increases with hν for all samples. The nonlinear optical parameters such as nonlinear refractive index (n2), the third-order nonlinear optical susceptibility (χ(3)), non-linear absorption coefficient (βc) increase with Cu, this means the samples had an ability to change their optical properties by doping. Both of the electrical susceptibility (χe) and relative permittivity (er) increase with Cu ratio. The semiconducting results such as, density of conduction band/electron effective mass [Nc/m*e (cm−3)], density of valence band/hole effective mass [Nv/m*h (cm−3)] were calculated.