Defect and transmission properties of two-dimensional quasiperiodic photonic band-gap systems

It has recently been demonstrated that two-dimensional photonic band gaps c an be realized in systems comprising of a quasiperiodic arrangement of diel ectric cylinders. We show that waveguides crafted out of such photonic ''qu asicrystals'' can be used to guide light around sharp corners, just as in t he case of periodic photonic band-gap systems, but the quasiperiodic system s tend to be more frequency selective. Because of the absence of translatio nal symmetry, these quasiperiodic photonic band-gap structures also display richer defect properties. Spectral gaps for both the TM and TE polarizatio ns in the same frequency range can be realized in metallodielectric configu rations. [S0163-1829(99)10505-8].