A few-layer graphene nanomechanical resonator driven by digitally modulated video signals

TL;DR

This paper demonstrates a few-layer graphene nanomechanical resonator's ability to act as a filter for broadband digitally modulated video signals, revealing complex vibrational dynamics under multifrequency drive.

Contribution

It introduces the use of a graphene nanomechanical resonator for demodulating digitally modulated signals into nanomechanical vibrations, showcasing new multifrequency driving capabilities.

Findings

Resonator responds selectively to multifrequency signals within its mechanical response range.

Vibrations exhibit interference patterns unique to coherent multifrequency drives.

The system can demodulate broadband digital video signals into nanomechanical vibrations.

Abstract

Nanomechanical resonators driven by multifrequency signals combine the physics of mesoscopic vibrations and the technologies of radio communication. Their simplest property stems from their resonant response: they behave as filters, responding only to driving signals whose frequency range is contained within that of the mechanical response. While the response is routinely probed with a single tone drive, a multifrequency drive offers the possibility of inducing richer vibrational dynamics. In this case, all the frequency components of the drive are simultaneously transduced into vibrations with different amplitudes and phases that superimpose and interfere. Here, we employ a few-layer graphene nanomechanical resonator as a filter for broadband, digitally modulated video signals. We transduce the modulated drive into modulated vibrations, which we demodulate into a nanomechanical video. Our work reveals distinctive features in vibrations driven by a coherent, multifrequency drive unseen in vibrations actuated by single tone drives or by a force noise.