Magnetomotive drive and detection of clamped-clamped mechanical resonators in water

Venstra, W. J.; Westra, H. J. R.; Gavan, K. Babaei; van der Zant, H. S. J.
December 2009
Applied Physics Letters;12/28/2009, Vol. 95 Issue 26, p263103
Academic Journal
We demonstrate magnetomotive drive and detection of doubly clamped string resonators in water. A compact 1.9 T permanent magnet is used to detect the fundamental and higher flexural modes of 200 μm long resonators. Good agreement is found between the magnetomotive measurements and optical measurements performed on the same resonator. The magnetomotive detection scheme can be used to simultaneously drive and detect multiple sensors or scanning probes in viscous fluids without alignment of detector beams.


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