Free-space cavity optomechanics in a cryogenic environment
Résumé
We present a free-space optomechanical system operating in the 1-K range. The device is made of
a high mechanical quality factor micropillar with a high-reflectivity optical coating atop, combined
with an ultra-small radius-of-curvature coupling mirror to form a high-finesse Fabry-Perot cavity
embedded in a dilution refrigerator. The cavity environment as well as the cryostat have been
designed to ensure low vibrations and to preserve micron-level alignment from room temperature
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