DOI: 10.1063/5.0164545 ISSN:
High-cooperativity cavity magnon-polariton using a high-Q dielectric resonator
Keisuke Kato, Ryo Sasaki, Kohei Matsuura, Koji Usami, Yasunobu Nakamura- General Physics and Astronomy
The hybrid system consisting of microwave photons and ferromagnetic magnons has been studied in the context of quantum sensing and quantum manipulation of magnons. We demonstrate a strong coupling between magnons and photons in a dielectric resonator with a large dielectric constant and high quality factor. The coupling rate between magnons and photons amounts to g/2π=126 MHz, and the corresponding cooperativity reaches C=1.09×106 at cryogenic temperature. The high cooperativity is mainly due to the small internal decay rate of the resonator, which is advantageous for various quantum magnonics experiments.