Print Email Facebook Twitter Light scattering by magnons in whispering gallery mode cavities Title Light scattering by magnons in whispering gallery mode cavities Author Sharma, S. (TU Delft QN/Bauer Group) Blanter, Y.M. (TU Delft QN/Blanter Group) Bauer, G.E. (TU Delft QN/Bauer Group; Tohoku University) Date 2017-09-12 Abstract Brillouin light scattering is an established technique to study magnons, the elementary excitations of a magnet. Its efficiency can be enhanced by cavities that concentrate the light intensity. Here, we theoretically study inelastic scattering of photons by a magnetic sphere that supports optical whispering gallery modes in a plane normal to the magnetization. Magnons with low angular momenta scatter the light in the forward direction with a pronounced asymmetry in the Stokes and the anti-Stokes scattering strength, consistent with earlier studies. Magnons with large angular momenta constitute Damon-Eschbach modes which are shown to inelastically reflect light. The reflection spectrum contains either a Stokes or anti-Stokes peak, depending on the direction of the magnetization, a selection rule that can be explained by the chirality of the Damon-Eshbach magnons. The controllable energy transfer can be used to manage the thermodynamics of the magnet by light. To reference this document use: http://resolver.tudelft.nl/uuid:943ddda9-3847-4290-a3c2-5802d0f052cb DOI https://doi.org/10.1103/PhysRevB.96.094412 ISSN 2469-9950 Source Physical Review B, 96 (9) Part of collection Institutional Repository Document type journal article Rights © 2017 S. Sharma, Y.M. Blanter, G.E. Bauer Files PDF PhysRevB.96.094412.pdf 726.79 KB Close viewer /islandora/object/uuid:943ddda9-3847-4290-a3c2-5802d0f052cb/datastream/OBJ/view