Pogrebnyak M. Photoinduced effects in thin photosensitive Аs2S3-Ag and AgCl-Ag films on glass substrates

Object of study: photoinduced effects developing at the interaction of laser beams with As2S3-Ag and AgCl-Ag films.Aim: Study of observation conditions and establishing the physics of new photoinduced optical effects developing at the interaction of laser beams with thin photosensitive As2S3-Ag and AgCl-Ag films.Methods: The growing of periodic structures was investigated both visually and using the photographic and photoelectric methods. Periods of peroidical and quasiperiodical structures were measured by diffraction methods. Structure of these features is studied with using of optical microscope.Results, novelty: For the first time it was found and studied the evolution of scattering оat the developing of periodic structures in As2S3-Ag films. It was shown that gradual destruction of TE0-micrograting and simultaneous growing of TМ0-microgratings is related with the amplification of TM0-modes due to increasing of film refraction index under irradiation.. For the first time it was found quasiperiodicstructures growing in the As2S3-Ag, AgCl-Ag films outside the irradiation spot, due to interference of the light scattered inside the substrate by zone of irradiation. For the first time it was studied the kinetics of optical turbulence at the developing of TE0-periodic structures in AgCl-Ag films. The hiperbolic law of attenuation of optical turblence is found. For the first time the building of periodic structures in AgCl-Ag films was studied using the optical microscope. The effective developing of TM0-periodic structures of S-type with periods d > l under the action of P-polarized gaussian beam is studied. Field of implementation: optics, laser physics.