Room temperature, cavity-free capacitive strong coupling to mechanical motion
Abstract
The back-action damping of mechanical motion by electromagnetic radiation is typically overwhelmed by internal loss channels unless demanding experimental ingredients such as superconducting resonators, high-quality optical cavities, or large magnetic fields are employed. Here we demonstrate the first room temperature, cavity-free, all-electric device where back-action damping exceeds internal loss, enabled by a mechanically compliant parallel-plate capacitor with a nanoscale plate separation and an aspect ratio exceeding 1,000. The device has four orders of magnitude lower insertion loss than a comparable commercial quartz crystal and achieves a position imprecision rivaling optical interferometers. With the help of a back-action isolation scheme, we observe radiative cooling of mechanical motion by a remote cryogenic load. This work provides a technologically accessible route to high-precision sensing, transduction, and signal processing.
Cite
@article{arxiv.2407.15314,
title = {Room temperature, cavity-free capacitive strong coupling to mechanical motion},
author = {Denise Puglia and Rachel Odessey and Peter S. Burns and Niklas Luhmann and Silvan Schmid and Andrew P. Higginbotham},
journal= {arXiv preprint arXiv:2407.15314},
year = {2025}
}
Comments
21+19 pages, 5+4 figures