Coherent pumping of high-momentum magnons by light

Journal article (2020)

Authors

Fran Šimić Kavli institute of nanoscience Delft
S. Sharma QN/Bauer Group - AS , Kavli institute of nanoscience Delft
Y.M. Blanter QN/Blanter Group - AS , Kavli institute of nanoscience Delft
G.E. Bauer Tohoku University, QN/Bauer Group - AS , Kavli institute of nanoscience Delft
Research Group
QN/Blanter Group (AS) (TU Delft)
Copyright: © 2020 Fran Šimić, S. Sharma, Y.M. Blanter, G.E. Bauer
DOI: https://doi.org/10.1103/PhysRevB.101.100401
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Published Date

2020

Language

English

Reuse Rights

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Blanter Group

Abstract

We propose and model a method to excite a large number of coherent magnons with high momentum in optical cavities. This is achieved by two counterpropagating optical modes that are detuned by the frequency of a selected magnon, similar to stimulated Raman scattering. In submillimeter-size yttrium iron garnet spheres, a milliwatt laser input power generates 106-108 coherent magnons. The large magnon population enhances Brillouin light scattering, a probe suitable to access their quantum properties.