Optical field-induced surface relief formation on chalcogenide and azo-benzene polymer films

Abstract

Abstract. The dependence of the surface relief formation in amorphous As 2 S 3 and Disperse Red 1dye grafted polyurethane polymer films on the polarization state of recording light was studied. It is shown that the direction of mass transport on the film surface is determined by the direction of light electric vector and photoinduced anisotropy in the film. We propose a photoinduced dielectropfhoretic model to explain the photoinduced mass transport in amorphous films. Model is based on the photoinduced softening of the matrix, formation of defects with enhanced or decreased polarizability, and their drift under the electrical field gradient of light.

Spectral Dependence of Photoinduced Formation of Surface Relief Gratings in Amorphous Chalcogenides

“…The largest SR modulation can be obtained with +45 o : -45 o and RCP: LCP recording beam configurations. Obtained results suggested that the whole illuminated volume of the film takes part in SRG formation process [10][11][12][13]. More profound studies showed the SRG formation dependencies on film thickness and grating period.…”