High efficiency right-angle bending structures in continuous slot waveguides

We present two new high efficiency right-angle slot waveguide bends based on a corner mirror and a triangular or square cavity. In contrast to previous devices, the nanophotonic slot regions in these bends are continuous, leading to more robust designs and the ability to create nanofluidic slot regions. The additional layer also leads to higher bending efficiencies, 95.4% and 94.1% for the bends with the triangular and square cavity, respectively.