LEVITODYNAMICS – Lukas Novotny – ETH Zurich, Photonics Laboratory

Data / Hora
Date(s) - 31/03/2023
15:00

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Seminário 

Prof. Lukas Novotny da ETH Zurich

31/03, às 15:00, no Auditório Padre Anchieta

LEVITODYNAMICS
Lukas Novotny
ETH Zurich, Photonics Laboratory, 8093 Zurich, Switzerland.

Localized optical fields exert both conservative and non-conservative forces on polarizable objects. These forces can be used to control and manipulate the motion of atoms, molecules or nanoparticles. In this presentation I discuss our experiments with optically levitated nanoparticles in ultrahigh vacuum. Using active feedback control we cool the particle’s center-of-mass motion to near strand-still and measure its quantum zero-point energy. A laser-trapped particle in high vacuum defines a harmonic oscillator with ultrahigh quality factor. I will show that its damping is dominated by photon recoil heating. A levitated nanoparticle is a model system for studying non-equilibrium processes, nonlinear interactions, and ultrasmall forces.