Energy-dependent path of dissipation in nanomechanical resonators

Nature Nanotechnology
Johannes GüttingerAdrian Bachtold

Abstract

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.

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Citations

Dec 24, 2017·Scientific Reports·O ShoshaniM I Dykman
Jan 22, 2019·Nature·Arthur W BarnardPaul L McEuen
Feb 23, 2019·Nanoscale·Minkyung JungChristian Schönenberger
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Mar 4, 2020·Proceedings of the National Academy of Sciences of the United States of America·Zhuo-Zhi ZhangGuo-Ping Guo
Jun 21, 2018·Scientific Reports·Robin J DollemanPeter G Steeneken
Jan 5, 2019·Physical Review Letters·David A CzaplewskiSteven W Shaw
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Feb 1, 2020·Physical Review Letters·You ZhouHongkun Park
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Apr 15, 2018·Scientific Reports·Damián H Zanette
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Feb 19, 2021·Nature Communications·Ata KeşkeklerFarbod Alijani
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Apr 3, 2019·Nano Letters·Nicolas MorellAdrian Bachtold
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Oct 7, 2021·Nano Letters·Qing-Hang ZhangGuo-Ping Guo

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