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Journal Article

Optical signatures of the coupled spin-mechanics of a levitated magnetic microparticle

MPS-Authors

Wachter,  Vanessa
Viola-Kusminskiy Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Department of Physics, Department of Physics, University of Erlangen-Nürnberg;

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Bittencourt,  Victor A. S. V.
Viola-Kusminskiy Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Xie,  Shangran
Russell Division, Max Planck Institute for the Science of Light, Max Planck Society;

Sharma,  Sanchar
Viola-Kusminskiy Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Joly,  Nicolas
Department of Physics, Department of Physics, University of Erlangen-Nürnberg;
Joly Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Russell,  Philip
Russell Emeritus Group, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Marquardt,  Florian
Marquardt Division, Max Planck Institute for the Science of Light, Max Planck Society;
Department of Physics, Department of Physics, University of Erlangen-Nürnberg;

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Viola-Kusminskiy,  Silvia
Viola-Kusminskiy Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Department of Physics, Department of Physics, University of Erlangen-Nürnberg;

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2021_Optical_signatures.png
(Supplementary material), 56KB

Citation

Wachter, V., Bittencourt, V. A. S. V., Xie, S., Sharma, S., Joly, N., Russell, P., et al. (2021). Optical signatures of the coupled spin-mechanics of a levitated magnetic microparticle. Journal of the Optical Society of America B-Optical Physics, 38(12). doi:10.1364/JOSAB.440562.


Cite as: https://hdl.handle.net/21.11116/0000-0009-0D15-2
Abstract
We propose a platform that combines the fields of cavity optomagnonics and levitated optome-
chanics in order to control and probe the coupled spin-mechanics of magnetic dielectric particles. We theoretically study the dynamics of a levitated Faraday-active dielectric microsphere serving as an optomagnonic cavity, placed in an external magnetic field and driven by an external laser. We find that the optically driven magnetization dynamics induces angular oscillations of the particle with low associated damping. Further, we show that the magnetization and angular motion dynamics
can be probed via the power spectrum of the outgoing light. Namely, the characteristic frequencies attributed to the angular oscillations and the spin dynamics are imprinted in the light spectrum by two main resonance peaks. Additionally, we demonstrate that a ferromagnetic resonance setup with an oscillatory perpendicular magnetic field can enhance the resonance peak corresponding to
the spin oscillations and induce fast rotations of the particle around its anisotropy axis.