Abstract

The control of the coupling and the reduction of cross talk between densely packed waveguides will be of great importance to increase the integration density of silicon photonic chips. Here, we controlled the dark mode of the coupling in three-waveguide system based on adiabatic elimination (AE). The three-waveguide system was equivalent to the atomic three-level system, and the middle waveguide functioned as the intermediate dark state, which had no coupling with the outer waveguides¹. The AE scheme was realized when the outer waveguides were identical and the propagation constant of the middle waveguide was larger than the other waveguides. This regime can be achieved in a four-waveguide system as well².

© 2016 Japan Society of Applied Physics, Optical Society of America