Compact and Robust Bent Axis Waveguide Coupler with a Sign Flip of the Phase Mismatch

Abstract

Bending the axis of a waveguide coupler results in phase mismatch between the coupled waveguides. Using a bent waveguide coupler, we realize shortcut to adiabatic light transfer between waveguides with a sign flip of the phase mismatch. The compact coupler is robust against parameter variations.