Abstract

A cross-linked azopolymer with high optical and thermal stability was prepared. A pure polarization grating without surface topology was fabricated from cross-linked azopolymer by polarization holography by use of orthogonal linearly polarized beams from a HeCd laser with a power density of 60mWcm2. The surface relief structure was investigated by atomic-force microscopy, and the polarization grating was observed by polarization optical microscopy. The grating spacing is 1.5μm. The grating is stable at room temperature and can endure repeated writing–erasing.

© 2006 Optical Society of America

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