Tunable Backaction of a DC SQUID on an Integrated Micromechanical Resonator

Journal article (2010)
Department
Kavli Institute of Nanoscience (AS) (TU Delft)
Copyright: © 2010 The Author(s); American Physical Society
DOI: https://doi.org/doi:10.1103/PhysRevLett.105.207203
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Published Date

10-11-2010

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Source:

Physical Review Letters, 105 (20), 2010

Faculty

Applied Sciences

Department

Kavli Institute of Nanoscience

Abstract

We have measured the backaction of a dc superconducting quantum interference device (SQUID) position detector on an integrated 1 MHz flexural resonator. The frequency and quality factor of the micromechanical resonator can be tuned with bias current and applied magnetic flux. The backaction is caused by the Lorentz force due to the change in circulating current when the resonator displaces. The experimental features are reproduced by numerical calculations using the resistively and capacitively shunted junction model.

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