Nanomechanics with graphene drums

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• Prof. Mandar M. Deshmukh
• Monday 14 May 2018, 17:00-18:00
• Electrical Engineering, Department of Engineering - Seminar Room - 9 JJ Thomson Avenue, Cambridge, CB3 0FA.

If you have a question about this talk, please contact Ashwin Seshia.

Graphene based nanomechanical devices are of interest for applications as well as fundamental studies. We demonstrate [1] strong dynamical coupling and parametric amplification in mechanical modes of a graphene drum using an all electrical configuration. Low tension in the system allows large electrostatic tunability of the modes thus enabling dynamic pumping experiments. In the strong coupling regime a red detuned pump gives rise to new eigenmodes having highly tunable mode splitting (cooperativity ~ 60) with coherent energy transfer. The coupling is also used to amplify the modes under the action of a blue detuned pump. In addition, self-oscillations and parametric amplification of the fundamental vibrational mode is demonstrated with a gain of nearly 3. The low mass and high frequency of these atomically thin resonators could prove useful for studying mode coupling in the quantum regime.

[1] J. P. Mathew, R. Patel, A. Borah, R. Vijay, M. M. Deshmukh Nature Nanotechnology 11, 747–751 (2016).

This talk is part of the Nanoscience Centre Seminar Series series.

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• All Talks (aka the CURE list)
• Cambridge Infectious Diseases
• Dobson Group - General Interest
• Electrical Engineering, Department of Engineering - Seminar Room - 9 JJ Thomson Avenue, Cambridge, CB3 0FA
• Nanoscience Centre Seminar Series
• School of Physical Sciences
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