$2\ \mu\text{m}\ 2\times 2$ Optical Switch based on a Thermo-Optically Tunable Multimode Interference SOI Waveguide

We design, fabricate and characterize a thermal-optically tunable Mach-Zehnder type optical switch operating in the $2\ \mu m$ window compatible with 220 nm SOI platform. It exhibits ∼30 dB extinction ratio at 32.3 mW driving power.