Magnetically tuned continuous transition from weak to strong coupling in terahertz magnon polaritons

作者：Andrey Baydin, Kenji Hayashida, Takuma Makihara, Fuyang Tay, Xiaoxuan Ma, Wei Ren, Guohong Ma, G. Timothy Noe, Ikufumi Katayama, Jun Takeda, Hiroyuki Nojiri, Shixun Cao, Motoaki Bamba, Junichiro Kono · 发表于：Physical Review Research · 年份：2023 · DOI：10.1103/physrevresearch.5.l012039 · 被引用次数：11 · 研究领域：Mechanical and Optical Resonators、Strong Light-Matter Interactions、Topological Materials and Phenomena

Highly tunable light-matter hybrids, magnon polaritons, have been realized in an orthoferrite crystal driven by terahertz radiation in an external magnetic field. As the magnetic field is swept, a continuous transition from weak to strong coupling via an exceptional point due to a magnetic-field-dependent light-matter coupling strength is observed.