Wave mixing in nonlinear magnetic metacrystal

We present experimental measurements of three-and four-wave mixing phenomena in an artificially structured nonlinear magnetic metacrystal at microwave frequencies. The sum frequency generation signal for the varactor-loaded split-ring resonator (VLSRR) metamaterial agrees quantitatively with that predicted using an analytical effective medium model describing the VLSRR medium. A resonant enhancement of the nonlinear response is observed near the metamaterial resonance. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3592574]