# A controllable superconducting electromechanical oscillator with a suspended membrane

## TL;DR

This paper reports the fabrication and experimental study of a superconducting electromechanical oscillator with a suspended membrane, demonstrating controllable resonance frequency via electromagnetic and optical fields, with potential applications in quantum systems.

## Contribution

It introduces a novel superconducting electromechanical system with controllable resonance frequency, combining microwave and optical control methods, and provides theoretical models for understanding the observed phenomena.

## Key findings

- Nonmonotonic dependence of resonance frequency on microwave power
- Optical switching of the mechanical resonance frequency
- Potential for microwave-optical interface applications

## Abstract

We fabricate a microscale electromechanical system, in which a suspended superconducting membrane, treated as a mechanical oscillator, capacitively couples to a superconducting microwave resonator. As the microwave driving power increases, nonmonotonic dependence of the resonance frequency of the mechanical oscillator on the driving power has been observed. We also demonstrate the optical switching of the resonance frequency of the mechanical oscillator. Theoretical models for qualitative understanding of our experimental observations are presented. Our experiment may pave the way for the application of a mechanical oscillator with its resonance frequency controlled by the electromagnetic and/or optical fields, such as a microwave-optical interface and a controllable element in a superqubit-mechanical oscillator hybrid system.