Parametric frequency mixing in the magneto-elastically driven FMR-oscillator

10 Oct 2016  ·  Chang C. L., Lomonosov A. M., Janusonis J., Vlasov V. S., Temnov V. V., Tobey R. I. ·

We demonstrate the nonlinear frequency conversion of ferromagnetic resonance (FMR) frequency by optically excited elastic waves in a thin metallic film on dielectric substrates. Time-resolved probing of the magnetization directly witnesses magneto-elastically driven second harmonic generation, sum- and difference frequency mixing from two distinct frequencies, as well as parametric downconversion of each individual drive frequency... Starting from the Landau-Lifshitz-Gilbert equations, we derive an analytical equation of an elastically driven nonlinear parametric oscillator and show that frequency mixing is dominated by the parametric modulation of FMR frequency. read more

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Materials Science