Radio frequency electrical transduction of graphene mechanical resonators

TL;DR

This paper demonstrates a radio frequency electrical readout method for graphene mechanical resonators, achieving high quality factors and fast response, which advances graphene's application in RF devices like filters and oscillators.

Contribution

The study introduces a direct RF electrical readout technique for graphene resonators with improved speed and minimized parasitic effects, enabling practical RF device integration.

Findings

Resonant frequency ~34 MHz with quality factor ~10000 at 77 K

Signal-to-background ratio over 20 dB

Readout method is over 200 times faster than previous RF mixing techniques

Abstract

We report radio frequency (rf) electrical readout of graphene mechanical resonators. The mechanical motion is actuated and detected directly by using a vector network analyzer, employing a local gate to minimize parasitic capacitance. A resist-free doubly clamped sample with resonant frequency ~ 34 MHz, quality factor ~ 10000 at 77 K, and signal-to-background ratio of over 20 dB is demonstrated. In addition to being over two orders of magnitude faster than the electrical rf mixing method, this technique paves the way for use of graphene in rf devices such as filters and oscillators.