Photoinduced extinction spectra in the thin waveguide AgCl-Ag films

Abstract

The results of experimental and theoretical research of extinction spectra of the AgCl­Ag films with thickness required for the excitation of marginal ТЕ0­mode when irradiated with polarized la ser light with λ0 = 407 nm. The spectra were investigated before and after irradiation of the films corres pondingly. In each of the two cases the absorbance and transmittance spectra of the film were cal culated by the formula using the model of the effective dielectric permittivity. It is established that the range of extinction consists of two components: the absorption and scattering spectra. It is shown that after the radiation the absorption spectrum is divided into two bands, which differ by the dis persion and the form and they determine the dichroism. The low­frequency spectral shift of the mi nimum of the scattering spectrum is explained relative to the minimum of the experimental spectra of extinction.