Two-dimensional photonic crystal for optical channel separation in azo polymers

Abstract

We have fabricated a two-dimensional photonic crystal that functions as a two-channel add/drop filter on azo-functionalized polymeric films using a fast, direct-writing method. By properly adjusting the resonance, this structure can be used as a multichannel add/drop filter in the plane of the film. Here, we were able to separate two channels at 1555.7 and 1570:7nm with attenuation of 13:1 dB and FWHM of 6:7nm for each channel. The separated channels were directed towards the sides at an approximately 90° angle with respect to the input direction. © 2009 Optical Society of America.