Approaching to the deep-strong photon-to-magnon coupling
- URL: http://arxiv.org/abs/2106.10450v1
- Date: Sat, 19 Jun 2021 08:18:52 GMT
- Title: Approaching to the deep-strong photon-to-magnon coupling
- Authors: I.A. Golovchanskiy, N.N. Abramov, V.S. Stolyarov, A.A. Golubov, M.Yu.
Kupriyanov, V.V. Ryazanov, A.V. Ustinov
- Abstract summary: ultra-strong photon-to-magnon coupling is demonstrated for on-chip multilayered superconductor/ferro/insulator hybrid thin film structures.
High characteristics of coupling are achieved owing to a radical suppression of the photon phase velocity in electromagnetic resonator.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: In this work, the ultra-strong photon-to-magnon coupling is demonstrated for
on-chip multilayered superconductor/ferromagnet/insulator hybrid thin film
structures reaching the coupling strength above 6 GHz, the coupling ratio about
0.6, the single-spin coupling strength about 350 Hz, and cooperativity about
10^4. High characteristics of coupling are achieved owing to a radical
suppression of the photon phase velocity in electromagnetic resonator. With
achieved coupling the spectrum reveals inapplicability of the Dicke model, and
evidences contribution of the diamagnetic A^2 interaction term in the
Hamiltonian of the system, which satisfies the Thomas-Reiche-Kuhn sum rule. The
contribution of the A^2 term denotes validity of the Hopfield quantum model and
manifests observation of a different hybrid polariton quasi-particle, namely,
the plasmon-magnon polariton.
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