Frequency transitions in phononic four-wave mixing

This work builds upon the recent demonstration of a phononic four-wave mixing pathway mediated by parametric resonance. In such a process, drive tones f(d1) and f(d2) associated with a specific phonon mode interact such that one of the drive tones also parametrically excites a second mode at a sub-harmonic frequency and such interactions result in a frequency comb f(d1)/2 +/- n(f(d1) - f(d2)). However, the specific behaviour associated with the case where both drive tones can independently excite the sub-harmonic phonon mode has not been studied or previously described. While it may be plausible to expect the merger of two frequency combs f(d1)/2 +/- n(f(d1) - f(d2))and f(d2)/2 +/- n(f(d1) - f(d2)), this paper indicates that only one of these mechanisms is selected and also shows an interesting transition linked to this process. The frequency transitions from f(d1)/2 +/- n(f(d1) - f(d2)) to f(d2)/2 +/- n(f(d1) - f(d2)) holds promise for computing applications. Published by AIP Publishing.