Compact and low cross-talk silicon-on-insulator crossing using a periodic dielectric waveguide

We propose and experimentally demonstrate a compact, highly efficient, and negligible cross-talk silicon-on-insulator crossing using a periodic dielectric waveguide. The crossing occupies a footprint of less than 4 mu m x 4 mu m. Around 0.7 dB insertion loss and lower than -40 dB, cross talk was achieved experimentally over a broad wavelength range. (C) 2010 Optical Society of America