Electrically Controllable Saturable Absorption in Hybrid Graphene-Silicon Waveguides

Abstract

Electrical tunability of saturable absorption is demonstrated in a graphene/SOI hybrid waveguide. The saturation modulation depth is tunable between 0 and 2.2 dB (∼0–40% decrease of absorption at saturation), with saturation powers between ∼1.25–2.5 W.