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

TL;DR

This paper demonstrates the experimental excitation of multiple coupled phononic frequency combs using two-mode parametric three-wave mixing, revealing new features in frequency comb generation through device coupling.

Contribution

It introduces a method to excite multiple phononic frequency combs simultaneously via coupling with identical devices, advancing control over phononic frequency combs.

Findings

Multiple frequency combs can be excited with a single external drive.

Coupling between devices influences the frequency comb features.

New characteristics of frequency combs are experimentally identified.

Abstract

This paper builds on the recent demonstration of three-wave mixing based phononic frequency comb. Here, in this process, an intrinsic coupling between the drive and resonant frequency leads to a frequency comb of spacing corresponding to the separation between drive and resonant frequency. Now, in this paper, we experimentally demonstrate the possibility to further excite multiple frequency combs with the same external drive through its coupling with other identical devices. In addition, we also experimentally identify interesting features associated with such a frequency comb generation process.