Coherent mechanical noise cancellation and cooperativity competition in optomechanical arrays
Abstract
Studying the interplay between multiple coupled mechanical resonators is a promising new direction in the field of optomechanics. Understanding the dynamics of the interaction can lead to rich new effects, such as enhanced coupling and multi-body physics. In particular, multi-resonator optomechanical systems allow for distinct dynamical effects due to the optical cavity coherently coupling mechanical resonators. Here, we study the mechanical response of two SiN membranes and a single optical mode, and find that the cavity induces a time delay between the local and cavity-transduced thermal noises experienced by the resonators. This results in an optomechanical phase lag that causes destructive interference, cancelling the mechanical thermal noise by up to 20 dB in a controllable fashion, matching our theoretical expectation. Based on the effective coupling between membranes, we further propose, derive and measure a collective effect, cooperativity competition on mechanical dissipation, whereby the linewidth of one resonator depends on the coupling efficiency (cooperativity) of the other resonator.
Keywords
Cite
@article{arxiv.2012.11733,
title = {Coherent mechanical noise cancellation and cooperativity competition in optomechanical arrays},
author = {Matthijs H. J. de Jong and Jie Li and Claus Gärtner and Richard A. Norte and Simon Gröblacher},
journal= {arXiv preprint arXiv:2012.11733},
year = {2022}
}