Abstract：Cavity Magnonics is an emerging field studying the light-matter interactions involving cavity photons and magnons. Via the quantum physics of spin-photon entanglement on the one hand, and classical electrodynamic coupling on the other, magnon-photon coupling connects some of the most exciting modern physics, such as quantum information and quantum optics, with one of the oldest science on the earth, the magnetism.

    This presentation outlines our recent advancement in this field through the creation of gain-driven cavity magnonics platforms. Commencing with the fundamental properties of van der Pol oscillator and Duffing oscillator, I will elucidate the novel physics of gain-driven light-matter interaction. This phenomenon is unveiled through the utilization of a combined van der Pol-Duffing oscillator, coupled with magnon oscillators. Employing various gain-driven cavity magnonics platforms, we have successfully prototyped a coherent microwave source, a coherent microwave amplifier, and showcased the anomalous coherence of remote magnon-photon interactions over a 2-meters long distance.

Biography: Can-Ming Hu is a Distinguished Professor at the University of Manitoba in Canada. He graduated from Fudan University in 1988, obtained his Ph.D. from the University of Würzburg in 1995, and received a Habilitation degree from the University of Hamburg in 2005. He served as an IEEE Magnetics Society’s Distinguished Lecturer (2018) and a Co-Chair of the Physics Evaluation Groups of NSERC Canada (2021-2022). He is a Fellow of the American Physical Society and an Outstanding Referee for APS journals. His group is now studying Cavity Magnonics and developing magnon-based microwave devices.