Photopolymerization techniques for the design of DFB organic lasers

We have investigated two approaches based on the use of photopolymerization techniques to create the corrugated surface, which is usually employed in the realization of organic distributed feedback (DFB) dye lasers. In the first approach, we use the strong capillary forces at the meniscus between a substrate and a colloidal sol to achieve highly ordered monolayered two-dimensional photonic crystal structures. In the second approach, we take advantage of the high spatial selectivity of the two-photon absorption process to design controlled polymerized pathways.