Lee, Oscar;
Yamamoto, Kei;
Umeda, Maki;
Zollitsch, Christoph W;
Elyasi, Mehrdad;
Kikkawa, Takashi;
Saitoh, Eiji;
... Kurebayashi, Hidekazu; + view all
(2023)
Nonlinear Magnon Polaritons.
Physical Review Letters
, 130
(4)
, Article 046703. 10.1103/physrevlett.130.046703.
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Abstract
We experimentally and theoretically demonstrate that nonlinear spin-wave interactions suppress the hybrid magnon-photon quasiparticle or “magnon polariton” in microwave spectra of a yttrium iron garnet film detected by an on-chip split-ring resonator. We observe a strong coupling between the Kittel and microwave cavity modes in terms of an avoided crossing as a function of magnetic fields at low microwave input powers, but a complete closing of the gap at high powers. The experimental results are well explained by a theoretical model including the three-magnon decay of the Kittel magnon into spin waves. The gap closure originates from the saturation of the ferromagnetic resonance above the Suhl instability threshold by a coherent backreaction from the spin waves.
| Type: | Article |
|---|---|
| Title: | Nonlinear Magnon Polaritons |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/physrevlett.130.046703 |
| Publisher version: | https://doi.org/10.1103/physrevlett.130.046703 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10164221 |
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