Linear and non-linear optical properties of spray deposited guanidine carbonate thin films

Abstract

The Guanidine carbonate thin films were deposited with a cost-effective method, namely simplified spray pyrolysis (or) perfume atomizer technique. The analyzes of nonlinear optical properties of thin films were carried out using the Z-scan and Eclipse Z-scan experiments. The linear optical properties such as linear refractive index, linear extinction coefficient, linear absorption coefficient, real part and imaginary part of dielectric constant, optical conductivity, electrical conductivity, optical susceptibility, electrical susceptibility and optical polarization were also examined using the UV–vis-NIR spectral analyses. The linear optical properties as a function of wavelength and as function of molar concentration are discussed. The nonlinear optical properties such as nonlinear absorption coefficient, nonlinear refractive index, third order susceptibility, change in refractive index and intensity dependent refractive coefficient are determined for the guanidine carbonate thin films using the Z-scan and eclipse Z-scan technique. The variation of the linear and nonlinear optical properties with respect to the chosen functional parameter has been presented. The laser damage threshold for the thin films were studied by the Q-switched Nd-YAG Laser. In addition, the investigation of optical limiting behavior also been carried out.