T1.2 Light-spin Interaction in Optomagnonic Whispering Gallery Resonators
Xufeng Zhang (Argonne National Laboratory)
Photonics provides high-precision methods for detecting and manipulating electronic signals. On the other hand, magneto-optical interactions make it possible to control magnetism using optical photons. In particular, collective magnetic excitation, which are also known as spin waves or magnons, can be coherently controlled by a laser. Because of the unique properties of magnonics such as its widely tunable frequency, they have recently emerged as a promising candidate for coherent information processing. Here we demonstrate that magnonic devices can be integrated with photonic resonators on magnetic insulator yttrium iron garnet. The excellent material property allows high optical quality factors approaching one million in the telecom C band, which significantly enhances the interaction between magnon and optical photons. The Brillouin scattering process between the optical photons and magnons generates asymmetric optical sidebands with orthogonal polarization. The magnon-photon interaction is further enhanced through the triple resonance of magnon, pump, and signal photon modes. Our results pave the way towards the development of optomagnonics and its application in signal processing.
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SYMPOSIUM T1 – MATERIALS FOR OPTOELECTRONICS
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Xufeng Zhang
Location: Technological Institute LR4