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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, optical binding of particle sin vacuum. For a single particle 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
Kishan Dholakia
"All in a spin: rotational dynamics of vacuum trapped microparticles", Proc. SPIE 11701, Complex Light and Optical Forces XV, 1170118 (5 March 2021); https://doi.org/10.1117/12.2583026
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Kishan Dholakia, "All in a spin: rotational dynamics of vacuum trapped microparticles," Proc. SPIE 11701, Complex Light and Optical Forces XV, 1170118 (5 March 2021); https://doi.org/10.1117/12.2583026