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SUMMARY:Nanomechanics with graphene drums - Prof. Mandar M. Deshmukh
DTSTART:20180514T160000Z
DTEND:20180514T170000Z
UID:TALK105988@talks.cam.ac.uk
CONTACT:Ashwin Seshia
DESCRIPTION:Graphene based nanomechanical devices are of interest for appl
 ications as well as fundamental studies. We demonstrate [1] strong dynamic
 al coupling and parametric amplification in mechanical modes of a graphene
  drum using an all electrical configuration. Low tension in the system all
 ows large electrostatic tunability of the modes thus enabling dynamic pump
 ing experiments. In the strong coupling regime a red detuned pump gives ri
 se to new eigenmodes having highly tunable mode splitting (cooperativity ~
  60) with coherent energy transfer. The coupling is also used to amplify t
 he modes under the action of a blue detuned pump. In addition\, self-oscil
 lations and parametric amplification of the fundamental vibrational mode i
 s demonstrated with a gain of nearly 3. The low mass and high frequency of
  these atomically thin resonators could prove useful for studying mode cou
 pling in the quantum regime.\n\n\n[1] J. P. Mathew\, R. Patel\, A. Borah\,
  R. Vijay\, M. M. Deshmukh Nature Nanotechnology 11\, 747–751 (2016).\n
LOCATION:Electrical Engineering\, Department of Engineering - Seminar Room
  - 9 JJ Thomson Avenue\, Cambridge\, CB3 0FA
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