Abstract
Influence of illumination by a white light of incandescent lamp (150 W) on the optical properties of thermally evaporated iron (III) chloride tetraphenylporphyrin (FeTPPCl) thin films have been performed. The optical constants of As-deposited and illuminated FeTPPCl thin films have been determined in the wavelength range 400–2500 nm using spectrophotometric measurements at nearly normal incidence of light. The type of optical transitions for As-deposited and illuminated FeTPPCl thin films is ascertained from the spectral behavior of their absorption coefficient, α. The real part of the refractive index of As-deposited and illuminated FeTPPCl thin films in the region of optical transparency is analyzed basing on single-oscillator and Drude models. The third order nonlinear susceptibility, χ(3), of As-deposited and illuminated FeTPPCl thin films is obtained from the single-oscillator model and the Miller’s rule.
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