Study of MoO3 doping effect on linear and Non-linear optical properties of Cellulose acetate (CA) films
Keywords:
CA; SELF; static dielectric constant; refractive index; oscillation energyAbstract
The goal of this study was to investigate the optical properties of the prepared
CA-MoO3 nanocomposites films. CA has been chosen as a host matrix and then
doped with MoO3 with different concentrations (2.5, 5, 10 and 15wt. %) of MoO3
by using casting procedure. CA-MoO3 films were characterized by UV-Visible
spectrophotometer within the wavelength range of 200 nm-800 nm. The Linear
optical parameters (transmission (T), extinction coefficient (K), reflectance (R),
refractive index (n), real (ε1) and imaginary (ε2 ) part of the dielectric constant and
optical conductivity (σopt )) of CA-MoO3 films were obtained from absorption
spectra. The volume (VELF) and surface (SELF) energy loss function of CAMoO3
films were obtained by complex dielectric constant. The Dispersion
parameters (dispersion energy (Ed ), oscillation energy (E0 ), static dielectric
constant (ε0 ) and static refractive index (n0 )) were calculated using theoretical
Wemple-DiDomenico model. The nonlinear optical susceptibility x(1), x(3) and
nonlinear refractive index n2 were evaluated from the linear optical parameters
using semiempirical relation. The results show that the Linear and nonlinear
optical parameters change with the increase of molybdenum trioxide
concentration, where, the transmittance, oscillator energy, the volume (VELF)
and surface (SELF) energy loss decreases with the increase of MoO3
concentration.
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