Non-degenerate parametric amplification and filtering in biomimetic hair flow sensors

We report non-degenerate parametric amplification in our biomimetic MEMS hair-based flow-sensors with improved responsivity and sharp filtering through AC-biasing. To the best of our knowledge, this is the first flow sensor with tunable filtering by non-degenerate electromechanical parametric amplification, applicable at a wide range of non-resonant frequencies and achieving highly selective gain of up to 20 dB.