Negative nonlinear damping of a multilayer graphene mechanical resonator

Vibhor Singh, Olga Shevchuk, Ya M. Blanter, Gary A. Steele

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)
107 Downloads (Pure)

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.

Original languageEnglish
Article number245407
JournalPhysical Review B (Condensed Matter and Materials Physics)
Volume93
Issue number24
DOIs
Publication statusPublished - 9 Jun 2016

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