We cool the fundamental mode of a miniature cantilever by capacitively coupling it to a driven rf resonant circuit. Cooling results from the rf capacitive force, which is phase shifted relative to the cantilever motion. We demonstrate the technique by cooling a 7 kHz cantilever from room temperature to 45 K, obtaining reasonable agreement with a model for the cooling, damping, and frequency shift. Extending the method to higher frequencies in a cryogenic system could enable ground state cooling and may prove simpler than related optical experiments in a low temperature apparatus.
@article{arxiv.0705.1197,
title = {Passive Cooling of a Micromechanical Oscillator with a Resonant Electric Circuit},
author = {K. R. Brown and J. Britton and R. J. Epstein and J. Chiaverini and D. Leibfried and D. J. Wineland},
journal= {arXiv preprint arXiv:0705.1197},
year = {2007}
}
Comments
4 pages, 4 figures; minor changes to match published version