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Negative nonlinear damping of a multilayer graphene mechanical resonator

Singh, Vibhor and Shevchuk, Olga and Blanter, Ya M and Steele, Gary A (2016) Negative nonlinear damping of a multilayer graphene mechanical resonator. In: PHYSICAL REVIEW B, 93 (24).

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Official URL: http://dx.doi.org/10.1103/PhysRevB.93.245407

Abstract

We experimentally investigate the nonlinear response of a multilayer graphene resonator using a superconducting microwave cavity to detect its motion. The radiation pressure force is used to drive the mechanical resonator in an optomechanically induced transparency configuration. By varying the amplitudes of drive and probe tones, the mechanical resonator can be brought into a nonlinear limit. Using the calibration of the optomechanical coupling, we quantify the mechanical Duffing nonlinearity. By increasing the drive force, we observe a decrease in the mechanical dissipation rate at large amplitudes, suggesting a negative nonlinear damping mechanism in the graphene resonator. Increasing the optomechanical backaction further, we observe instabilities in the mechanical response.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 05 Jul 2016 06:32
Last Modified: 05 Jul 2016 06:32
URI: http://eprints.iisc.ac.in/id/eprint/54132

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