Tuning The Nonlinear Response Of Coupled Split-Ring Resonators

We introduce the concept of controlling the nonlinear response of the metamaterial by altering its internal structure. We experimentally demonstrate tuning of the nonlinear response of two coupled split-ring resonators by changing their mutual position. This effect is achieved through modification of the structure of the coupled resonant modes and their interaction with the incident field. By offsetting the resonators we control the maximum currents through the nonlinear elements, which affect the nonlinear response of the system. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3689775]