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Updated: Apr 7, 2026

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators
Published on: August 8, 2025
Thermomechanical Two-Mode Squeezing in an Ultrahigh-Q Membrane Resonator
Y S Patil1, S Chakram1, L Chang1
1Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, USA.
Abstract:
We realize a quantum-compatible multimode interaction in an ultrahigh Q mechanical resonator via a reservoir-mediated parametric coupling. We use this interaction to demonstrate nondegenerate parametric amplification and thermomechanical noise squeezing, finding excellent agreement with a theoretical model of this interaction over a large dynamic range. This realization of strong multimode nonlinearities in a mechanical platform compatible with quantum-limited optical detection and cooling makes this a powerful system for nonlinear approaches to quantum metrology, transduction between optical and phononic fields, and the quantum manipulation of phononic degrees of freedom.
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