Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 59: Magnonics III
MA 59.4: Talk
Friday, March 13, 2026, 10:15–10:30, POT/0361
Optical vortex generation by magnons with spin-orbit-coupled light — •Ryusuke Hisatomi1,2, Alto Osada3, Kotaro Taga1, Haruka Komiyama1, Takuya Takahashi1, Shutaro Karube1,2, Yoichi Shiota1,2, and Teruo Ono1,2 — 1Institute for Chemical Research, Kyoto University, Uji, Japan — 2Center for Spintronics Research Network, Institute for Chemical Research, Kyoto University, Uji, Japan — 3Center for Quantum Information and Quantum Biology (QIQB), Osaka University, Toyonaka, Osaka, Japan
Magneto-optic effects are generally described as the interaction between spin systems and collimated light (paraxial light). However, in many real-world systems studied in magneto-optics research, light focused by an objective lens (non-paraxial light) is utilized, which inherently exhibits optical spin-orbit coupling. Such spin-orbit-coupled light possesses a longitudinal electric-field component. Recently, we found that the interaction between spin-orbit-coupled light and collective spin dynamics (i.e., magnons) leads to optical vortex scattering, and we developed a theoretical framework to reproduce this phenomenon. The result provides the first step toward a comprehensive magneto-optics study incorporating optical vortices.
Keywords: Optical vortex; Optical spin-orbit interaction; Magnon induced Brillouin light scattering