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.
@article{arxiv.1902.10956,
title = {A controllable superconducting electromechanical oscillator with a suspended membrane},
author = {Yong-Chao Li and Jiang-shan Tang and Jun-Liang Jiang and Jia-Zheng Pan and Xin Dai and Xing-Yu Wei and Ya-Peng Lu and Sheng Lu and Xue-Cou Tu and Hua-bing Wang and Ke-yu Xia and Guo-Zhu Sun and Pei-Heng Wu},
journal= {arXiv preprint arXiv:1902.10956},
year = {2019}
}