Aalto Physics Colloquium: Prof. Lukas Novotny
Welcome to the next Aalto Physics Colloquium on Thursday 19th December 2019!
Our distinguished guest, prof. Lukas Novotny, Professor of Photonics at ETH Zurich, will present his research on "Levitodynamics".
I discuss our experiments with optically levitated nanoparticles in ultrahigh vacuum. Using both active and passive feedback techniques we cool the particle’s center-of-mass temperature to T 100μK and reach mean quantum occupation numbers of n ~ 15. I show that mechanical quality factors of Q = 109 can be reached and that damping is dominated by photon recoil heating. The vacuum-trapped nanoparticle forms an ideal model system for studying non-equilibrium processes, nonlinear interactions, and ultrasmall forces.