A symmetry-breaking electromechanical detector

Mahboob, I.; Froitier, C.; Yamaguchi, H.
May 2010
Applied Physics Letters;5/24/2010, Vol. 96 Issue 21, p213103
Academic Journal
The dynamical double well potential underpinning the stable oscillation phases in an electromechanical parametric resonator is manipulated via a secondary field excitation applied at the natural frequency of the oscillator. This enables symmetry to be lifted in the dynamical potential well and results in the parametric resonator oscillating with a preferred phase. The ability to break symmetry in the dynamical double well potential permits the realization of a symmetry-breaking detector which can resolve resonance frequency (f0) shifts of δf0/f0∼10-7 in a single-shot measurement.


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