Hysteresis-induced multistability in a nonlinear Terahertz split ring resonator

The development of photonic memory devices will be a big issue in the future for applications such as communication. Multistability will therefore be a desired behavior for such devices. In this paper, the dynamical behavior of a nonlinear split-ring resonator (NSRR) under AC and DC excitation is investigated in two-parameter space diagram at terahertz (THz) frequency regime. The hysteresis effect induces multistability in the NSRR and some coexisting dynamic regions are revealed. The results obtained in this work not only demonstrate that multistable metasurfaces are feasible, but also provide some numerical leads to researchers who are already thinking about the development of multistable terahertz devices.