Mechanically Modulated Sideband and Squeezing Effects of Membrane Resonators

TL;DR

This paper explores how low-frequency eigenfrequency modulation in membrane resonators affects sideband spectra and thermal fluctuation squeezing, offering a new method for squeezing characterization and potential applications.

Contribution

It demonstrates the control of antiresonance lineshapes via parametric modulation and links antiresonance frequency to thermal fluctuation squeezing in membrane resonators.

Findings

Antiresonance lineshapes are controllable through vibration state.

A direct connection between antiresonance frequency and squeezing is established.

Provides a new method for squeezing characterization.

Abstract

We investigate the sideband spectra of a driven nonlinear mode with its eigenfrequency being modulated at a low frequency (< 1 kHz). This additional parametric modulation leads to prominent antiresonance lineshapes in the sideband spectra, which can be controlled through the vibration state of the driven mode. We also establish a direct connection between the antiresonance frequency and the squeezing of thermal fluctuation in the system. Our work not only provides a simple and robust method for squeezing characterization but also opens a new possibility toward sideband applications.