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

Wachter V, Bittencourt VASV, Xie S, Sharma S, Joly N, Russell PSJ, Marquardt F, Viola Kusminskiy S (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Book Volume: 38

Pages Range: 3858-3871

Journal Issue: 12

DOI: 10.1364/JOSAB.440562

Abstract

We propose a platform that combines the fields of cavity optomagnonics and levitated optomechanics 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. (C) 2021 Optical Society of America

Authors with CRIS profile

Additional Organisation(s)

Related research project(s)

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light Germany (DE)

How to cite

APA:

Wachter, V., Bittencourt, V.A.S.V., Xie, S., Sharma, S., Joly, N., Russell, P.S.J.,... Viola Kusminskiy, S. (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), 3858-3871. https://dx.doi.org/10.1364/JOSAB.440562

MLA:

Wachter, Vanessa, et al. "Optical signatures of the coupled spin-mechanics of a levitated magnetic microparticle." Journal of the Optical Society of America B-Optical Physics 38.12 (2021): 3858-3871.

BibTeX: Download