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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Tobar, Michael
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2024Conductivity freeze-out in isotopically pure Si -28 at millikelvin temperaturescitations
- 2019Experimental implementations of cavity-magnon systemscitations
- 2019Low-Temperature Properties of Whispering-Gallery Modes in Isotopically Pure Silicon-28citations
- 2018Isotopically Pure Silcon-28 Whispering Gallery Mode Resonators
- 2018Cavity magnon polaritons with lithium ferrite and three-dimensional microwave resonators at millikelvin temperaturescitations
- 2016A 3D printed superconducting aluminium microwave cavitycitations
- 2016Ultrahigh cooperativity interactions between magnons and resonant photons in a YIG spherecitations
- 2015Discovery of iron group impurity ion spin states in single crystal Y2SiO5 with strong coupling to whispering gallery photonscitations
- 2007Dependence of the dielectric permittivity of single-crystal quartz on thermal deformation at cryogenic temperaturescitations
- 2004The dual-mode frequency-locked technique for the characterisation of the temperature coefficient of permittivity of ainsotropic materialscitations
- 2004Whispering-Gallery Mode Technique Applied to the Measurement of the Dielectric Properties of Langasite Between 4 K and 300 K
- 2004Measurement of the strain-induced coefficient of permittivity of sapphire using whispering gallery modes excited in a high-Q acoustic sapphire oscillatorcitations
- 2001Whispering Gallery Method of Measuring Complex Permittivity in Highly Anisotropic Materials: Discovery of a New Type of Mode in Anisotropic Dielectric Resonatorscitations
- 2000Microwave characterisation of BaCe2Ti5O15 and Ba5Nb4O15 ceramic dielectric resonators using whispering gallery mode methodcitations
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article
Ultrahigh cooperativity interactions between magnons and resonant photons in a YIG sphere
Abstract
© 2016 American Physical Society. Resonant photon modes of a 5-mm-diameter yttrium iron garnet (YIG) sphere loaded in a cylindrical cavity in the 10-30-GHz frequency range are characterized as a function of applied dc magnetic field at millikelvin temperatures. The photon modes are confined mainly to the sphere and exhibited large mode filling factors in comparison to previous experiments, allowing ultrastrong coupling with the magnon spin-wave resonances. The largest observed coupling between photons and magnons is 2g/2p=7.11 GHz for a 15.5-GHz mode, corresponding to a cooperativity of C=1.51±0.47×107. Complex modifications, beyond a simple multioscillator model, of the photon mode frequencies were observed between 0 and 0.1 T. Between 0.4 and 1 T, degenerate resonant photon modes were observed to interact with magnon spin-wave resonances with different coupling strengths, indicating time-reversal symmetry breaking due to the gyrotropic permeability of YIG. Bare dielectric resonator mode frequencies were determined by detuning magnon modes to significantly higher frequencies with strong magnetic fields. By comparing measured mode frequencies at 7 T with finite element modeling, a bare dielectric permittivity of 15.96±0.02 of the YIG crystal has been determined at about 20 mK.