[Seminar] All in a spin: rotational dynamics of trapped, levitated microparticles

Title: All in a spin: rotational dynamics of trapped, levitated microparticles

Speaker: Prof Kishan Dholakia
School of Physics & Astronomy, University of St Andrews, Scotland

Abstract:
Trapping microparticles in vacuum has led to the burgeoning area of levitated optomechanics. Here we will describe recent work on rotating particles in vacuum. This offers a rich playground for dynamics. In particular we describe how we can attain very high rotation rates by spin angular momentum transfer and observe optical binding of particles in vacuum. For a single particle in vacuum stochastic, thermal fluctuations combine with nonconservative optical forces to break detailed balance and produce increasingly coherent, apparently deterministic motion. In turn this leads to the highest Q value ever reported for a vacuum traded microparticle opening up new studies of sensors.

Meeting URL:     https://oist.zoom.us/j/96737459676?pwd=RDBoRm1Cb3R0TmVaMXR5bUptbEJiUT09&from=addon

Meeting ID:     967 3745 9676
Passcode:    543450