| Autor: |
Rao JW; Department of Physics and Astronomy, University of Manitoba, Winnipeg, Canada, R3T 2N2., Xu PC; Department of Physics and Astronomy, University of Manitoba, Winnipeg, Canada, R3T 2N2., Gui YS; Department of Physics and Astronomy, University of Manitoba, Winnipeg, Canada, R3T 2N2., Wang YP; Department of Physics and Astronomy, University of Manitoba, Winnipeg, Canada, R3T 2N2., Yang Y; Department of Physics and Astronomy, University of Manitoba, Winnipeg, Canada, R3T 2N2., Yao B; State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, 200083, China. yaobimu@mail.sitp.ac.cn.; School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China. yaobimu@mail.sitp.ac.cn., Dietrich J; Department of Electrical Engineering, University of Manitoba, Winnipeg, Canada, R3T 2N2., Bridges GE; Department of Electrical Engineering, University of Manitoba, Winnipeg, Canada, R3T 2N2., Fan XL; The Key Lab for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou, 730000, China., Xue DS; The Key Lab for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou, 730000, China., Hu CM; Department of Physics and Astronomy, University of Manitoba, Winnipeg, Canada, R3T 2N2. hu@physics.umanitoba.ca. |
| Abstrakt: |
The perfect absorption of electromagnetic waves has promoted many applications, including photovoltaics, radar cloaking, and molecular detection. Unlike conventional methods of critical coupling that require asymmetric boundaries or coherent perfect absorption that require multiple coherent incident beams, here we demonstrate single-beam perfect absorption in an on-chip cavity magnonic device without breaking its boundary symmetry. By exploiting magnon-mediated interference between two internal channels, both reflection and transmission of our device can be suppressed to zero, resulting in magnon-induced nearly perfect absorption (MIPA). Such interference can be tuned by the strength and direction of an external magnetic field, thus showing versatile controllability. Furthermore, the same multi-channel interference responsible for MIPA also produces level attraction (LA)-like hybridization between a cavity magnon polariton mode and a cavity photon mode, demonstrating that LA-like hybridization can be surprisingly realized in a coherently coupled system. |
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