![]() The key to simulating the bistability effect is to specify a custom CW source "source_custom" with a carrier frequency that is detuned from the resonant frequency. For the chi3 nonlinear coefficient, we use a value 10 times larger than the one in reference so that the field intensity required to observe the bistability effect is smaller.įig.2 Kerr and Linear materials in the Material Database. To introduce nonlinear effects into the simulation, we will add a chi3 nonlinear polarization via the Chi3/Chi2 model from the Material Database (see Fig. ![]() Nonlinear Ring Resonator Nonlinear material We will use the resonance peak at ~ 1550nm as the reference for the subsequent nonlinear simulation. 1.įig.1 Transmission spectrum for simulation with Linear material. Once the simulation is done, the transmission can be plotted directly from the output monitor "T" as shown in Fig. To run the linear simulation starting from ], make sure to disable "source_custom", enable "source_broadband" and set the material of the ring from "Kerr" to "Linear". First, a simulation without any nonlinear material runs in order to find the location of the resonance peaks for this device. The model is based on the design from reference, which is a metal-dielectric-metal plasmonic gap waveguide that is coupled to a plasmonic racetrack cavity filled with a nonlinear Kerr medium. We will use a 2D FDTD simulation for this example (this can be simulated with either MODE 2.5D FDTD Propagator or FDTD). In this example, we will study the optical bistability effect in a plasmonic racetrack resonator using a nonlinear Kerr Chi3 material model.
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