物理科学与技术学院学术报告:Synchronized spin-photon coupling in a microwave cavity

报告题目: Synchronized spin-photon coupling in a microwave cavity

报告人: 夏钶教授 北京师范大学

报告时间:416日(星期一)下午1400

报告地点:物理科技楼101

The magnon-phonon strong coupling has become an important direction in magnon spintronics, where main issues are to generate, manipulate, and use spin waves to design future devices. We study spin-photon coupling in cavity in the presence of relative phase shift between two ferromagnetic resonance driving forces. We show that the anticrossing gap can be manipulated by varying the relative phase. Increasing the phase difference leads to narrowing the anticrossing gap of hybridized modes and eventually to phase locked coupling at the value of relative phase of π. The FMR and cavity modes become phase locked and oscillate at the same frequency near the resonance frequency. Characteristic linewidth drop and transmission amplitude enhancement are demonstrated. The phase resolved spin-photon coupling can be used both for phase imaging and controlling coupling parameters.

报告人简介:

Prof. Ke Xia (KX) gained degrees from the Nanjing University in 1997. After postdoctoral fellowships at University of Twente in the Netheralnds and North Carolina State University, he was selected into "100 Talents Program" of CAS in 2002. He moved to Department of Physics, Beijing Normal University on 2009. His research interests concentrate on the theory of electronic and magneto-electronics of nano-scale structures. He has published over 80 refereed papers in this research area. His group has developed a tight-binding linear-muffin-tin orbitals(TB-LMTO) wave function matching method to handle STT in magnetic metallic multi-layers. He has been selected by Outstanding Young Scientists Program of NSFC to support his research of spin transport in the semiconductor and magnetic structures on the nanoscale.

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