Nonlinear modal coupling in a high-stress doubly-clamped nanomechanical resonator

Lulla, K. J. and Cousins, R. B. and Venkatesan, A. and Patton, M. J. and Armour, A. D. and Mellor, C. J. and Owers-Bradley, J. R. (2012) Nonlinear modal coupling in a high-stress doubly-clamped nanomechanical resonator. New Journal of Physics, 14. ISSN 1367-2630

Full text not available from this repository.

Abstract

We present results from a study of the nonlinear inter-modal coupling between different flexural vibrational modes of a single high-stress, doubly-clamped silicon nitride nanomechanical beam. Using the magnetomotive technique and working at 100 mK we explored the nonlinear behaviour and modal couplings of the first, third and fifth modes of a 25.5 μm long beam. We find very good agreement between our results and a simple analytical model which assumes that the different modes of the resonator are coupled to each other by displacement induced tension in the beam. The small size of our resonator leads to relatively strong nonlinear couplings, for example we find a shift of about 7 Hz in the third mode for a 1 nm displacement in the first mode and frequency shifts ~ 20 times larger than the linewidth (130 Hz) are readily observed.

Item Type:
Journal Article
Journal or Publication Title:
New Journal of Physics
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
87143
Deposited By:
Deposited On:
24 Jul 2017 12:52
Refereed?:
Yes
Published?:
Published
Last Modified:
24 Mar 2020 05:53