Chiral coupling of magnons in waveguides

Journal article (2020)

Authors

T. Yu QN/Bauer Group - AS , Kavli institute of nanoscience Delft
Xiang Zhang Kavli institute of nanoscience Delft, QN/Blaauboer Group - AS
S. Sharma Kavli institute of nanoscience Delft, QN/Bauer Group - AS
Y.M. Blanter QN/Blanter Group - AS , Kavli institute of nanoscience Delft
G.E. Bauer Tohoku University, Kavli institute of nanoscience Delft, QN/Bauer Group - AS
Research Group
QN/Bauer Group (AS) (TU Delft)
Copyright: © 2020 T. Yu, Xiang Zhang, S. Sharma, Y.M. Blanter, G.E. Bauer
DOI: https://doi.org/10.1103/PhysRevB.101.094414
More Info
expand_more

Published Date

2020

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Bauer Group

Abstract

We theoretically investigate the collective excitations of multiple (sub)millimeter-sized ferromagnets mediated by waveguide photons. By the position of the magnets in the waveguide, the magnon-photon coupling can be tuned to be chiral, i.e., magnons only couple with photons propagating in one direction, leading to an asymmetric transfer of angular momentum and energy between the magnets. A large enhancement of the magnon number population can be achieved at an edge of a long chain of magnets. The chain also supports standing waves with low radiation efficiency that are inert to the chirality.