A micropillar for cavity optomechanics
  We present a new micromechanical resonator designed for cavity optomechanics. We have used a micropillar geometry to obtain a high-frequency mechanical resonance with a low effective mass and a very high quality factor. We have coated a 60-$\mu$m diameter low-loss dielectric mirror on top of the pillar and are planning to use this micromirror as part of a high-finesse Fabry-Perot cavity, to laser cool the resonator down to its quantum ground state and to monitor its quantum position fluctuations by quantum-limited optical interferometry. 
A. G. Kuhn (LKB - Jussieu), M. Bahriz (DMPH), O. Ducloux (DMPH), C.   Chartier (DMPH), O. Le Traon (DMPH), T. Briant (LKB - ...
quant-ph cond-mat.other physics.optics