Strong to ultrastrong coherent coupling measurements in a YIG/cavity system at room temperature

Guillaume Bourcin, Jeremy Bourhill, Vincent Vlaminck, Vincent Castel

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We present an experimental study of the strong to ultrastrong coupling regimes at room temperature in frequency-reconfigurable three-dimensional reentrant cavities coupled with a yttrium-iron-garnet slab. The observed coupling rate, defined as the ratio of the coupling strength to the cavity frequency of interest, ranges from 12% to 59%. We show that certain considerations must be taken into account when analyzing the polaritonic branches of a cavity spintronic device where the rf field is highly focused in the magnetic material. Our observations are in excellent agreement with electromagnetic finite-element simulations in the frequency domain.

Original languageEnglish
Article number214423
JournalPhysical Review B
Volume107
Issue number21
DOIs
Publication statusPublished - 1 Jun 2023

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