Dynamical strong coupling and parametric amplification in mechanical modes of graphene drums

Abstract

Mechanical resonators are ubiquitous in modern information technology. With the ability to couple them to electromagnetic and plasmonic modes, they hold the promise to be the key building blocks in future quantum information technology. Graphene based resonators are of interest for technological applications due to their high resonant frequencies, multiple mechanical modes, and low mass. The tension mediated non-linear coupling between various modes of the resonator can be excited in a controllable manner. Here, we engineer a graphene resonator to have large frequency tunability at low temperatures resulting in large intermodal coupling strength. We observe the emergence of new eigenmodes and amplification of the coupled modes using red and blue parametric excitation respectively. We demonstrate that the dynamical intermodal coupling is tunable. A cooperativity of 60 between two resonant modes of ~100 MHz is achieved in the strong coupling regime. The ability to dynamically control the coupling between high frequency eigenmodes of a mechanical system opens up possibility for quantum mechanical experiments at low temperatures.

Published online in Nature Nanotechnology (2016)

References in corpus (13)

• Sideband Cooling Micromechanical Motion to the Quantum Ground State
• Optomechanically induced transparency
• Quantum Theory of Cavity-Assisted Sideband Cooling of Mechanical Motion
• Theory of ground state cooling of a mechanical oscillator using dynamical back-action
• Circuit cavity electromechanics in the strong coupling regime
• Cavity Optomechanics
• Optomechanical coupling between a multilayer graphene mechanical resonator and a superconducting microwave cavity
• Probing thermal expansion of graphene and modal dispersion at low-temperature using graphene NEMS resonators
• Nonlinear modal interactions in clamped-clamped mechanical resonators
• Coupling graphene mechanical resonators to superconducting microwave cavities
• Graphene optomechanics realized at microwave frequencies
• Two-mode squeezing in an electromechanical resonator
• Strong and tunable mode coupling in carbon nanotube resonators

Cited by in corpus (5)

• Optomechanical measurement of thermal transport in two-dimensional MoSe2 lattices
• Strong Vibrational Coupling in Room Temperature Plasmonic Resonators
• Strong 4-mode coupling of nanomechanical string resonators
• Monitoring Electrostatically-Induced Deflection, Strain and Doping in Suspended Graphene using Raman Spectroscopy
• Switching off energy decay channels in nanomechanical resonators