Abstract
MoS2 is a layered quasi-2D material that can enhance effective third-order optical nonlinearity of waveguides. In this paper, we measured the optical loss of MoS2 on silicon waveguides and compared the conversion efficiencies of four-wave mixing (FWM) in silicon waveguides with and without MoS2 on the top cladding. Hybrid integration of the few-layer MoS2 produced about 4 dB enhancement in the idler output of FWM. The Kerr coefficient of MoS2 was obtained as (2.7 ± 0.2) × 10−16 m2 W−1. The refractive index of MoS2 was obtained from the characteristics of grating couplers.
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