HIGH TRANSMISSION THROUGH SHARP BENDS IN PHOTONIC CRYSTAL WAVE-GUIDES

We demonstrate highly efficient transmission of light around sharp cor ners in photonic bandgap waveguides. :Numerical simulations reveal com plete transmission at certain frequencies, and very high transmission (>95%) over wide frequency ranges. High transmission is observed even for 90 degrees bends with zero radius of curvature, with a maximum tra nsmission of 98% as opposed to 30% for analogous conventional dielectr ic waveguides. We propose a simple one-dimensional scattering theory m odel with a dynamic frequency-dependent well depth to describe the tra nsmission properties.