講演情報
[23a-A201-1]Tunable magnon-photon coupling in YIG sphere/metallic band structure
〇Tatsushi Uno1, Shugo Yoshii1, Haruka Komiyama1, Ei Shigematsu1,2, Ryo Ohshima1,2, Yuichiro Ando1,2, Ryusuke Hisatomi1,2, Teruo Ono1,2, Masashi Shiraishi1,2 (1.Kyoto Univ., 2.CSRN, Kyoto Univ)
キーワード：
YIG sphere、magnon photon coupling
Magnon-photon coupling has been an attractive phenomenon for the application of magnon to quantum information processing. Whereas Y3Fe5O12 (YIG) sphere is an optimal material for magnon-photon coupling, the range of applications of YIG spheres has been limited because of difficulty in controlling magnons. Here, we expect a tunable magnon-photon coupling system by modulating magnon damping depending on the angle between a metallic band on a YIG sphere and a external static magnetic field. The cylindrical TiO2 (rutile) resonator with resonance frequency of 2.6 GHz was fixed to a sapphire substrate and placed in the Cu shield. A static magnetic field was applied vertically. The circular coil connected to port 1 of vector network analyzer (VNA) was placed near the sapphire substrate and the YIG sphere with a Pt band was inserted into the resonator. We measured S11 of VNA with sweeping the static magnetic field in two different angles of the Pt band. As a result, changes in the coupled system from the strong coupling regime to the weak coupling regime were observed depending on the angle between the Pt band and the external magnetic field.