Coherent mechanical noise cancellation and cooperativity competition in optomechanical arrays

Coherent mechanical noise cancellation and cooperativity competition in optomechanical arrays

de Jong, M.H.J. (TU Delft QN/Groeblacher Lab; TU Delft Dynamics of Micro and Nano Systems; Kavli institute of nanoscience Delft)
Li, J. (TU Delft QN/Groeblacher Lab; Zhejiang University; Kavli institute of nanoscience Delft)
Gartner, C.M. (TU Delft QN/Groeblacher Lab; Kavli institute of nanoscience Delft)
Norte, R.A. (TU Delft Dynamics of Micro and Nano Systems)
Groeblacher, S. (TU Delft QN/Groeblacher Lab; Kavli institute of nanoscience Delft)

2022

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 and 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.

http://resolver.tudelft.nl/uuid:caf0c0fd-bafd-4872-b56f-ae22843e0bfe

https://doi.org/10.1364/OPTICA.446434

2334-2536

Optica, 9 (2), 170-176

Institutional Repository

journal article

© 2022 M.H.J. de Jong, J. Li, C.M. Gartner, R.A. Norte, S. Groeblacher