Driving nanomechanical resonators by phonon flux in superfluid \(\mathbf{^4He}\)
Abstract
We report on nanomechanical resonators with very high-quality factors operated as mechanical probes in liquid helium , with special attention to the superfluid regime down to millikelvin temperatures. Such resonators have been used to map out the full range of damping mechanisms in the liquid on the nanometer scale from up to . The high sensitivity of these doubly-clamped beams to thermal excitations in the superfluid makes it possible to drive them using the momentum transfer from phonons generated by a nearby heater. This so-called "\textit{phonon wind}" is an inverse thermomechanical effect that until now has never been demonstrated, and provides the possibility to perform a new type of optomechanical experiments in quantum fluids.
Keywords
Cite
@article{arxiv.1810.10129,
title = {Driving nanomechanical resonators by phonon flux in superfluid \(\mathbf{^4He}\)},
author = {A. M. Guénault and A. Guthrie and R. P. Haley and S. Kafanov and Yu. A. Pashkin and G. R. Pickett and V. Tsepelin and D. E. Zmeev and E. Collin and R. Gazizulin and O. Maillet and M. Arrayás and J. L. Trueba},
journal= {arXiv preprint arXiv:1810.10129},
year = {2019}
}
Comments
The manuscript has been split into two publications currently accepted in PRB and PRL. The splitted manuscripts will be uploaded to arxiv