Volume 81, Number 5, March 2008
|Number of page(s)||5|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||12 February 2008|
Radiation-pressure self-cooling of a micromirror in a cryogenic environment
Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences Boltzmanngasse 3, A-1090 Vienna, Austria
2 Faculty of Physics, University of Vienna - Boltzmanngasse 5, A-1090 Vienna, Austria
Accepted: 10 January 2008
We demonstrate radiation-pressure cavity-cooling of a mechanical mode of a micromirror starting from cryogenic temperatures. To achieve that, a high-finesse Fabry-Pérot cavity (F≈2200) was actively stabilized inside a continuous-flow 4He cryostat. We observed optical cooling of the fundamental mode of a 50 μm 50 μm 5.4 μm singly clamped micromirror at = 3.5 MHz from 35 K to approximately 290 mK. This corresponds to a thermal occupation factor of 1104. The cooling performance is only limited by the mechanical quality and by the optical finesse of the system. Heating effects, e.g. due to absorption of photons in the micromirror, could not be observed. These results represent a next step towards cavity-cooling a mechanical oscillator into its quantum ground state.
PACS: 42.50.-p – Quantum optics / 07.10.Cm – Micromechanical devices and systems / 42.50.Wk – Mechanical effects of light on material media, microstructures and particles
© EPLA, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.