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We will review our recent activities on GaAs/AlGaAs electromechanical parametric resonators. Piezoelectric transduction allows us to electrically modulate the resonance frequency, providing an on-chip testbed for nonlinear phononics experiments. Both degenerate and nondegenerate parametric amplification, as well as the excitation of parametric resonance, are performed for single and multi-mode resonators...
Two recent approaches to dynamically convert the phonon frequency using the semiconductor-based electromechanical resonators are presented. One is coherent phonon manipulation in coupled mechanical resonators and the other is all-mechanical phonon lasing in a mechanical three-level system. The examples demonstrate the high functionality of semiconductor-based electromechanical resonators.
Superconducting quantum interference devices (SQUIDs) can detect tiny amounts of magnetic flux and are also used to study macroscopic quantum effects. We employ a dc SQUID as a linear detector of the displacement of an embedded micromechanical resonator with a femtometer sensitivity. We discuss the measurement method, including operation in high magnetic field and a cryogenic amplification scheme...
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