Levitated Optomechanics: cooling six degrees of freedom

by Dr. Marko Toros

University of Glasgow
at Quantum optics seminar

Wed, 21 Feb 2024, 16:00
Zoom Only


Zoom link: https://us02web.zoom.us/j/82147644023?pwd=QlNwTDJZSmNzYWZ5eUt2cEtjR20zdz09

We will start by giving a pedagogical introduction to optomechanics with levitated nanoparticles [1]. We will discuss how the dielectric coupling creates an optical trap for the nanoparticle and review basic cavity and tweezer setups. We will then show how to exploit the optomechanical coupling to probe/control the nanoparticle's center-of-mass motion and the rotational degrees of freedom.
In the second part we will look at the current state-of-the-art in levitated optomechanics. Cooling the center-of-mass motion to the ground state along one [2-4] and two [5] axis has been recently achieved. We will conclude by discussing the first experimental demonstration of simultaneous cooling of all six degrees of freedom of an optically levitated nanoparticle [6].

[1] "Optomechanics with levitated particles." Reports on Progress in Physics 83, no. 2 (2020): 026401.
[2] "Cooling of a levitated nanoparticle to the motional quantum ground state." Science 367, no. 6480 (2020): 892-895.
[3] "Real-time optimal quantum control of mechanical motion at room temperature." Nature 595, no. 7867 (2021): 373-377.
[4] "Quantum control of a nanoparticle optically levitated in cryogenic free space." Nature 595, no. 7867 (2021): 378-382.
[5] "Simultaneous ground-state cooling of two mechanical modes of a levitated nanoparticle." Nat. Phys. 19, 1009–1013 (2023)
[6] “Simultaneous cooling of all six degrees of freedom of an optically levitated nanoparticle by elliptic coherent scattering” Nat. Phys. 19, 1003–1008 (2023)

Created on 14-02-2024 by Folman, Ron (folman)
Updaded on 18-02-2024 by Folman, Ron (folman)