Aalto Physics Colloquium: Prof. Lukas Novotny
Welcome to the next Aalto Physics Colloquium on Thursday 19th December 2019 at 14.00-15.00.
Coffee and cake will be served after the presentation, from 15.00 - 15.30. Please register here to attend, so that we have enough refreshments for all!
Our distinguished guest, prof. Lukas Novotny, Professor of Photonics at ETH Zurich, will present his research on "Levitodynamics".
Professor Novotny’s expertise lies in the broader fields of photonics and optoelectronics. His main research interest is understanding and controlling light-matter interactions on a nanometer scale with applications ranging from ultrasensitive detection and metrology to efficient and directional photon emission.
I will discuss our experiments with optically levitated nanoparticles in an ultrahigh vacuum. Using both active and passive feedback techniques we are able to 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.