Quantum-inspired design of a tunable broadband high-Q acoustic resonator

TL;DR

This paper introduces a quantum-inspired acoustic resonator design that achieves high quality factors over a broad frequency range by mimicking twisted bilayer graphene, overcoming traditional trade-offs in resonator bandwidth and Q.

Contribution

It proposes a novel, tunable broadband high-Q acoustic resonator inspired by quantum phenomena in twisted van der Waals heterostructures, demonstrating a new design paradigm.

Findings

Achieved Q as high as 4,000 in simulations

Resonances separated by as little as 10 Hz

Bandwidth extends up to 1 kHz

Abstract

Resonators with a high quality factor (Q) are crucial components in a wide range of advanced technologies, including energy harvesting, chemical and biological sensing, and second-harmonic generation. Many applications also require resonance across a broad frequency range. However, single-cavity resonators face a fundamental trade-off between bandwidth and quality factor. Here we propose an acoustic resonator that overcomes this limitation by drawing inspiration from the ladder of harmonic oscillator states observed in twisted van der Waals heterostructures. By simulating an acoustic analog of twisted bilayer graphene, we discover a tunable ladder of acoustic resonances with Q as high as 4,000. These resonances are separated by as little as 10 Hz and persist over a bandwidth as broad as 1 kHz, forming an effective high-Q, broadband system. Our approach offers a promising pathway to overcome the inherent trade-offs in traditional resonators and paves the way for advanced high-Q acoustic devices.