Cavity-enhanced thermo-optic bistability and hysteresis in a graphene-on-Si3N4 ring resonator
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AbstractCavity-enhanced thermo-optic bistability is studied in a graphene-on-Si3N4 ring resonator. By engineering the coverage of the monolayer graphene on top of the Si3N4 ring resonator, we observed a two-fold enhancement in the thermo-optically induced resonance shift rate and an 18-fold increase in the effective thermal nonlinear refractive index compared with the devices without graphene. The thermo-optic hysteresis loop was also characterized in this hybrid structure, where the experimental results agree well with the theoretical calculations. This Letter paves the way for graphene-on-Si3N4-based high-speed photodetectors, modulators, and devices for on-chip nonlinear optical applications.
All Author(s) ListGao Y, Zhou W, Sun XK, Tsang HK, Shu C
Journal nameOptics Letters
Volume Number42
Issue Number10
Pages1950 - 1953
LanguagesEnglish-United States
KeywordsIntegrated optics devices, Optical resonators, Bistability, Nonlinear optics, integrated optics.

Last updated on 2021-19-02 at 00:47