Multiband planar infrared metallodielectric photonic crystals designed using genetic algorithms with fabrication constraints

Planar metallodielectric photonic crystals (MDPCs) with multiple stop-bands in the far-infrared transmission spectrum have been designed using frequency selective surface (FSS) techniques at the micron-scale. A genetic algorithm (GA) has been used to optimize MDPC designs that exhibit multiple stop-bands with greater than 10 dB attenuation. It is shown that, by including design constraints in the GA to account for limitations in the fabrication process, it is still possible to synthesize a subset of MDPC structures that both meet the desired performance criteria and are capable of being accurately fabricated.