Cavity Optomagnonics with Spin-Orbit Coupled Photons

作者：Alto Osada, Ryusuke Hisatomi, Atsushi Noguchi, Yutaka Tabuchi, Rekishu Yamazaki, Koji Usami, Mark Sadgrove, Ramachandrarao Yalla, Masahiro Nomura, Yasunobu Nakamura · 发表于：Physical Review Letters · 年份：2016 · DOI：10.1103/physrevlett.116.223601 · 被引用次数：450 · 研究领域：Mechanical and Optical Resonators、Photonic and Optical Devices、Advanced MEMS and NEMS Technologies

We experimentally implement a system of cavity optomagnonics, where a sphere of ferromagnetic material supports whispering gallery modes (WGMs) for photons and the magnetostatic mode for magnons. We observe pronounced nonreciprocity and asymmetry in the sideband signals generated by the magnon-induced Brillouin scattering of light. The spin-orbit coupled nature of the WGM photons, their geometrical birefringence, and the time-reversal symmetry breaking in the magnon dynamics impose the angular-momentum selection rules in the scattering process and account for the observed phenomena. The unique features of the system may find interesting applications at the crossroad between quantum optics and spintronics.