Coherent pumping of high-momentum magnons by light

Fran Šimić, Sanchar Sharma, Yaroslav M. Blanter, Gerrit E.W. Bauer

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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.

Original languageEnglish
Article number100401
Number of pages5
JournalPhysical Review B
Volume101
Issue number10
DOIs
Publication statusPublished - 2020

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