Combining a fully switchable THz superconducting metamaterial with a 2DEG for ultra-strong coupling

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作者：
J. Keller
C. Maissen
G. Scalari
M. Beck
S. Cibella
R. Leoni
J. Faist
机构：
[1] Eidgenössische Technische Hochschule Zürich,Institute of Quantum Electronics
[2] CNR,Istituto di Fotonica e Nanotecnologie (IFN)
来源：
The European Physical Journal Plus | / 132卷
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摘要：
We study terahertz (THz) superconducting split-ring resonators showing that the resonance of the metasurface is fully switchable via the superconducting transition, exhibiting a resonance only below the critical temperature and a critical magnetic field. Combining this metamaterial with a two-dimensional electron gas (2DEG), which is forming Landau levels in magnetic field, we aim for an ultra-strongly coupled system. We report on experiments showing strong coupling between the excited cavity mode and the 2DEG and we discuss possible scenarios for observing ultra-strong coupling with the fundamental LC mode.
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