2007/05/31 by Simon Gröblacher, Simon Groeblacher, Sylvain Gigan +4 · 1 citation
Engineering · Physics and Astronomy · #Advanced MEMS and NEMS Technologies #Mechanical and Optical Resonators #Photonic and Optical Devices #cond-mat.mtrl-sci #quant-ph
paper · pdf · doi:10.1209/0295-5075/81/54003
published as Europhys. Lett. 81, 54003 (2008)
openalex publication_date 2008/02/12 · arxiv created 2008/02/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
\n 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 \ω m = 3.5 MHz from 35 K to approximately 290 mK. This corresponds to a thermal occupation factor of \⟨ n\⟩ \≈ 1\×104. 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.\n