COOLING AND AMPLIFICATION OF A VACUUM-TRAPPED NANOPARTICLE
Lukas NOVOTNY, Photonics Laboratory, ETH Zürich
We optically trap a single nanoparticle in high vacuum and cool its three spatial degrees of freedom by means of active parametric feedback. The small size and mass of the nanoparticle yield high resonance frequencies and high Q-factors along with low recoil heating, which are essential conditions for ground state cooling and for low decoherence. The vacuum-trapped nanoparticle forms an ideal model system for studying non-equilibrium processes, nonlinear interactions, and ultrasmall forces.
Figure 1: (top) Photograph of light scattered from a trapped 85 nm fused silica particle (arrow). The object to the right is the outline of the objective lens. (bottom) Time trace of the particle’s x coordinate (transverse to optical axis) at 2mbar pressure. Trapping times of several days have been achieved.
Montag, 15. April 2013, 17:30 Uhr (ab 17:00 Uhr Kaffee)
Fakultät für Physik, Lise-Meitner-Hörsaal
Strudlhofgasse 4, 1090 Wien