Complete Band Gaps in 2D Photonic Quasicrystals

摘要

We introduce a novel optimization method to design the first examples ofphotonic quasicrystals with substantial, complete photonic band gaps (PBGs):that is, a range of frequencies over which electromagnetic wave propagation isforbidden for all directions and polarizations. The method can be applied tophotonic quasicrystals with arbitrary rotational symmetry; here, we illustratethe results for 5- and 8-fold symmetric quasicrystals. The optimized band gapsare highly isotropic, which may offer advantages over photonic crystals forcertain applications.