On the Generation of Phononic Frequency Combs Using Defect Modes of Phononic Crystals

TL;DR

This paper introduces a novel method for generating phononic frequency combs using defect modes in phononic crystals, enabling tunable spectral line generation for advanced sensing and quantum applications.

Contribution

It demonstrates defect engineering in phononic crystals as a new platform for controllable phononic frequency comb generation.

Findings

Localized defect modes produce evenly spaced spectral lines.

Numerical models show robust energy transfer and spectral sidebands.

Potential applications in high-resolution sensing and quantum technologies.

Abstract

This paper proposes a method for generating phononic frequency combs (PFCs) using defect-localized modes in a two-dimensional hexagonal phononic crystal. Localized vibration modes from a singular point defect produce evenly spaced spectral lines corresponding to PFCs. Numerical modelling reveals robust energy transfer under a single-tone drive, generating spectral sidebands. These results demonstrate defect engineering in phononic crystals as a tunable platform for PFC generation with significant applications in high-resolution sensing, timing, and quantum-acoustic technologies.