Opt Lett. 2013 Dec 1;38(23):5036-9. doi: 10.1364/OL.38.005036.
We report observation of optical bistability and enhanced thermal nonlinearity in a graphene-silicon waveguide resonator. Photo-induced Joule heating in the graphene layer gives rise to a temperature increase in the silicon waveguide core and a corresponding thermo-optic shift in the resonance of the Fabry-Perot resonator. Measurement of the nonlinear resonance spectra showed a 9-fold increase in the effective thermal nonlinear index due to the graphene layer compared with a bare silicon waveguide.
我们报告了在石墨烯-硅波导谐振器中观察到的光学双稳性和热非线性增强。石墨烯层中的光致焦耳加热导致硅波导芯的温度升高，以及法布里-珀罗谐振器的共振的相应热光位移。非线性共振光谱的测量显示，与裸硅波导相比，由于石墨烯层的存在，有效热非线性指数增加了 9 倍。
