Investigation of photoinduced formation of microstructures on the surface of carbaseole-containing azopolymer depending on the power density of incident beams

Abstract

In this paper we synthesized and measured optical characteristics of an azopolymer based on the polymer N-epoxypropylcarbazole and chromophore 4 - (4-nytrophenylazo)-aniline. Regularities in surface microstructure formation under the influence of a Gaussian beam focused on the synthesized polymer film were shown. With the linearly polarized incident laser beam, the anisotropic formation of the surface microstructures was demonstrated. The dependence of the microstructure formation on the incident beam power density was studied. Also, we experimentally investigated the nonlinear optical effects emerging in the azopolymer structure exposed to a high-intensity laser beam. Nonlinear topographic effects arising during the formation of microstructures by means of linearly and elliptically polarized beams were described.

Keywords

• optical recording materials
• azopolymer
• photoisomerization
• polarization state
• surface relief
• Gaussian beam