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This paper builds on the recent demonstration of three-wave mixing basedphononic frequency comb. Here, in this process, an intrinsic coupling betweenthe drive and resonant frequency leads to a frequency comb of spacingcorresponding to the separation between drive and resonant frequency. Now, inthis paper, we experimentally demonstrate the possibility to further excitemultiple frequency combs with the same external drive through its coupling withother identical devices. In addition, we also experimentally identifyinteresting features associated with such a frequency comb generation process.

Excitation of coupled phononic frequency combs via two-mode parametric three-wave mixing