Optically Induced Surface Gratings on Azoaromatic Polymer Films

摘要

The surface of an azoaromatic polymer film is optically altered to produce localhighly efficient diffraction gratings. The gratings obtained are stable but can be erased by heating the polymer above its glass transition temperature and no permanent damage of the film is observed. Multiple gratings can be simultaneously written and gratings can be overwritten. Atomic force microscopy was used to investigate the gratings produced on the surfaces. Possible mechanisms responsible for the surface alteration are discussed. (jg).