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Dynamic manipulation of nanomechanical resonators in the high-amplitude regime and non-volatile mechanical memory operation

Nature Nanotechnology volume 6, pages 726732 (2011) | Download Citation

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Abstract

The ability to control mechanical motion with optical forces has made it possible to cool mechanical resonators to their quantum ground states. The same techniques can also be used to amplify rather than reduce the mechanical motion of such systems. Here, we study nanomechanical resonators that are slightly buckled and therefore have two stable configurations, denoted ‘buckled up’ and ‘buckled down’, when they are at rest. The motion of these resonators can be described by a double-well potential with a large central energy barrier between the two stable configurations. We demonstrate the high-amplitude operation of a buckled resonator coupled to an optical cavity by using a highly efficient process to generate enough phonons in the resonator to overcome the energy barrier in the double-well potential. This allows us to observe the first evidence for nanomechanical slow-down and a zero-frequency singularity predicted by theorists. We also demonstrate a non-volatile mechanical memory element in which bits are written and reset by using optomechanical backaction to direct the relaxation of a resonator in the high-amplitude regime to a specific stable configuration.

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Acknowledgements

The authors thank M. Rooks (Yale Institute for Nanoscience and Quantum Engineering) for help with electron-beam lithography, and M. Power for help with device fabrication. The authors also acknowledge funding support from the DARPA/MTO ORCHID programme through a grant from the Air Force Office of Scientific Research (AFOSR). H.X.T. acknowledges support from a Packard Fellowship in Science and Engineering and a career award from the National Science Foundation. M.P. acknowledges a Rubicon fellowship from the Netherlands Organization for Scientific Research (NWO)/Marie Curie Cofund Action.

Author information

Author notes

    • Mo Li

    Present address: Department of Electrical and Computer Engineering, University of Minnesota, Minnesota 55455, USA

Affiliations

  1. Department of Electrical Engineering, Yale University, New Haven, Connecticut 06511, USA

    • Mahmood Bagheri
    • , Menno Poot
    • , Mo Li
    • , Wolfram P. H. Pernice
    •  & Hong X. Tang

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Contributions

M.B. performed the device fabrication and carried out measurements and data analysis under the supervision of H.X.T. M.B. and M.P. contributed to numerical analysis of the coupled optomechanical system. M.B., M.P., M.L., W.P.H.P. and H.X.T. discussed the results and all authors contributed to the writing of the manuscript.

Competing interests

The authors declare no competing financial interests.

Corresponding author

Correspondence to Hong X. Tang.

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DOI

https://doi.org/10.1038/nnano.2011.180

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