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Journal Article

Antiferromagnetic cavity optomagnonics

MPS-Authors
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Parvini,  Tahereh S.
Viola-Kusminskiy Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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

Fulltext (public)

PhysRevResearch.2.022027
(Publisher version), 53KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Parvini, T. S., Bittencourt, V. A. S. V., & Viola-Kusminskiy, S. (2020). Antiferromagnetic cavity optomagnonics. Physical Review Research, 2(2): 022027(R). doi:10.1103/PhysRevResearch.2.022027.


Cite as: http://hdl.handle.net/21.11116/0000-0005-AD60-C
Abstract
Currently there is a growing interest in studying the coherent interaction between magnetic systems and electromagnetic radiation in a cavity, prompted partly by possible applications in hybrid quantum systems. We propose a multimode cavity optomagnonic system based on antiferromagnetic insulators, where optical photons couple coherently to the two homogeneous magnon modes of the antiferromagnet. These have frequencies typically in the THz range, a regime so far mostly unexplored in the realm of coherent interactions, and which makes antiferromagnets attractive for quantum transduction from THz to optical frequencies. We derive the theoretical model for the coupled system, and show that it presents unique characteristics. In particular, if the antiferromagnet presents hard-axis magnetic anisotropy, the optomagnonic coupling can be tuned by a magnetic field applied along the easy axis. This allows us to bring a selected magnon mode into and out of a dark mode, providing an alternative for a quantum memory protocol. The dynamical features of the driven system present unusual behavior due to optically induced magnon-magnon interactions, including regions of magnon heating for a red-detuned driving laser. The multimode character of the system is evident in a substructure of the optomagnonically induced transparency window.