Energy-dependent path of dissipation in nanomechanical resonators
Journal article, 2017

Energy decay plays a central role in a wide range of phenomena, such as optical emission, nuclear fission, and dissipation in quantum systems. Energy decay is usually described as a system leaking energy irreversibly into an environmental bath. Here, we report on energy decay measurements in nanomechanical systems based on multilayer graphene that cannot be explained by the paradigm of a system directly coupled to a bath. As the energy of a vibrational mode freely decays, the rate of energy decay changes abruptly to a lower value. This finding can be explained by a model where the measured mode hybridizes with other modes of the resonator at high energy. Below a threshold energy, modes are decoupled, resulting in comparatively low decay rates and giant quality factors exceeding 1 million. Our work opens up new possibilities to manipulate vibrational states, engineer hybrid states with mechanical modes at completely different frequencies, and to study the collective motion of this highly tunable system.

Author

J. Güttinger

Barcelona Institute of Science and Technology (BIST)

A. Noury

Barcelona Institute of Science and Technology (BIST)

P. Weber

Barcelona Institute of Science and Technology (BIST)

Martin Eriksson

Chalmers, Physics, Condensed Matter Theory

C. Lagoin

Barcelona Institute of Science and Technology (BIST)

J. Moser

Barcelona Institute of Science and Technology (BIST)

C. Eichler

Swiss Federal Institute of Technology in Zürich (ETH)

A. Wallraff

Swiss Federal Institute of Technology in Zürich (ETH)

Andreas Isacsson

Chalmers, Physics, Condensed Matter Theory

A. Bachtold

Barcelona Institute of Science and Technology (BIST)

Nature Nanotechnology

1748-3387 (ISSN)

Vol. 12 7 631-636

Graphene-Based Revolutions in ICT And Beyond (Graphene Flagship)

European Commission (FP7), 2013-10-01 -- 2016-03-31.

Areas of Advance

Energy

Materials Science

Subject Categories

Nano Technology

Condensed Matter Physics

DOI

10.1038/nnano.2017.86

More information

Latest update

3/19/2018