Dielectric waveguides in two-dimensional photonic bandgap materials

We investigate the performance and guiding properties of waveguides fabrica ted in a finite two-dimensional (2-D) photonic bandgap (PBG) structure. Con finement in the direction perpendicular to the plane of periodicity is achi eved by fabricating the 2-D PEG structure in a high dielectric layer enclos ed by two lower dielectric layers. Simulations using the finite-difference time-domain (FDTD) method are performed to investigate the energy transport in such waveguides. Good qualitative agreement is found with the experimen tal observations.