Cavity Optomechanics of Topological Spin Textures in Magnetic Insulators

Collective dynamics of topological magnetic textures can be thought of as a massive particle moving in a magnetic pinning potential. We demonstrate that inside a cavity resonator this effective mechanical system can feel the electromagnetic radiation pressure from cavity photons through the magneto-...

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Bibliographic Details
Published in:arXiv.org 2019-01
Main Authors: Proskurin, Igor, Ovchinnikov, Alexander S, Jun-ichiro Kishine, Stamps, Robert L
Format: Article
Language:English
Subjects:
Cavity resonators
Chirality
Circular polarization
Cotton
Coupling
Domain walls
Electromagnetic radiation
Helicity
Insulators
Magnetism
Mechanical systems
Opto-mechanics
Parameter estimation
Photons
Polarized light
Radiation pressure
Spin dynamics
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Summary:Collective dynamics of topological magnetic textures can be thought of as a massive particle moving in a magnetic pinning potential. We demonstrate that inside a cavity resonator this effective mechanical system can feel the electromagnetic radiation pressure from cavity photons through the magneto-optical inverse Faraday and Cotton-Mouton effects. We estimate values for the effective parameters of the optomechanical coupling for two spin textures -- a Bloch domain wall and a chiral magnetic soliton lattice. The soliton lattice has magnetic chirality, so that in circularly polarized light it behaves like a chiral particle with the sign of the optomechanical coupling determined by the helicity of the light and chirality of the lattice. Most interestingly, we find a level attraction regime for the soliton lattice, which is tunable through an applied magnetic field.
ISSN:2331-8422
DOI:10.48550/arxiv.1809.10091