Abstract
We experimentally investigated the thermal nonlinearity in a MoS2-on-silicon microring resonator. In the hybrid MoS2-on-silicon microring resonator, there was a threefold increase in the resonance shift rate as input optical power increased. The effective photothermal coefficient of the MoS2-on-silicon resonator was enhanced to 4.7 × 10−15 m2 W−1. The enhancement can be attributed to the presence of defect states of the MoS2 film, leading to additional absorption of light and enhanced heating, which changed the effective refractive index of the resonator. Efficient thermal bistability was observed in the resonator.
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