Related Experiment Video
Updated: May 1, 2026
09:10
Fabrication and Testing of Microfluidic Optomechanical Oscillators
Published on: May 29, 2014
11.7K
Graphene nanoelectromechanical systems as stochastic-frequency oscillators.
Tengfei Miao1, Sinchul Yeom, Peng Wang
1Department of Physics and Astronomy, University of California , Riverside, California 92521, United States , and.
Nano Letters
|April 19, 2014
Summary
The quality factor (Q) of graphene resonators decreases with increasing temperature (T). This study reveals stochastic frequency broadening, not friction, limits Q in these atomically thin devices.
Area of Science:
- Physics
- Materials Science
- Nanotechnology
Background:
- Few-layer graphene drumhead resonators are promising for sensitive measurements.
- Understanding dissipation mechanisms is crucial for optimizing resonator performance.
Purpose of the Study:
- To experimentally measure the quality factor (Q) of graphene resonators.
- To develop a theoretical model explaining Q limitations.
- To investigate factors influencing spectral line broadening.
Main Methods:
- Electrical driving of few-layer graphene drumhead resonators.
- Temperature-dependent measurements of resonator quality factor.
- Development of a theoretical model incorporating intermodal coupling and stochastic effects.
Main Results:
- Demonstrated Q is inversely proportional to temperature (Q ∝ 1/T).
- Identified stochastic frequency broadening as the primary Q-limiting mechanism.
- Observed nonlinear damping and parametric amplification effects at higher drive voltages.
Conclusions:
- Graphene resonator Q is fundamentally limited by out-of-plane fluctuations and stochastic broadening.
- The developed model accurately predicts experimental observations.
- Findings advance the understanding of dissipation in atomically thin resonators.
