Journal
PHYSICAL REVIEW B
Volume 90, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.205309
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Funding
- Swiss National Science Foundation (SNF) through the National Centre of Competence in Research Quantum Science and Technology (QSIT) [129823]
- ERC Advanced Grant Quantum Metamaterials in the Ultra Strong Coupling Regime (MUSiC)
- FIRST clean room collaborators at ETH
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The ultrastrong light-matter interaction regime was investigated in metallic and superconducting complementary split-ring resonators coupled to the cyclotron transition of two-dimensional electron gases. The subwavelength light confinement and the large optical dipole moment of the cyclotron transition yield record high normalized coupling rates of up to Omega(R)/omega(c) = 0.87. We observed a blue-shift of both polaritons due to the diamagnetic term of the interaction Hamiltonian.
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