AUTHOR=Yang Cheng , Sheng Jiteng , Wu Haibin 

TITLE=Controllable Phononic Low-Pass Filter via Optomechanical Interactions

JOURNAL=Frontiers in Physics

VOLUME=10

YEAR=2022

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2022.904467

DOI=10.3389/fphy.2022.904467

ISSN=2296-424X

ABSTRACT=<p>We present an experimental demonstration of an optically controllable phononic low-pass filter in a multimode optomechanical system. By coupling two spatially separated nanomechanical resonators <italic>via</italic> optomechanical interactions, the phononic signal below a cutoff frequency can be transferred between mechanical resonators, while the signal above the cutoff frequency is attenuated, which resembles an electronic low-pass filter. Moreover, the cutoff frequency is controllable by tuning the optomechanical interaction <italic>via</italic> the intracavity field. Our results provide an essential element in phononic circuits and have potential applications for information processing in hybrid quantum systems.</p>