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Quantum Metamaterials in the Ultra Strong Coupling regime

Objective

Due to their mixed photon-electronic excitation character, cavity polaritons have highly interesting properties. Especially interesting is the so-called ultrastrong coupling regime, reached when the strength of the photon-two-level system coupling is larger than the energy of the resonant state. We have recently demonstrated that terahertz metamaterials coupled to high-mobility two-dimensional electron gases is an almost ideal, field-tunable system that enables the exploration of this ultra-strong coupling regime.
In this project, we want to explore four key physical questions opened by this new approach. First we plan to explore the limit of ultra-strong coupling in our systems, including the emission of Casimir-like squeezed vacuum photons upon non-adiabatic change in the coupling energy and parametric generation of light. Secondly we would like to test a theoretical prediction anticipating, in the ultra-strong coupling regime, a quantum phase transition to a Dicke superradiant state upon substitution of the GaAs/AlGaAs two-dimensional electron gas by a graphene layer or multilayers. Thirdly, we claim that our metamaterial-based system also enables the study of coupled polaritons by either direct meta-atom electromagnetic coupling or using a waveguide bus and superconducting circuits. Finally, we want to explore polaritonic emitters and non-linear elements.

Call for proposal

ERC-2013-ADG
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Host institution

EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZUERICH
Address
Raemistrasse 101
8092 Zuerich
Switzerland
Activity type
Higher or Secondary Education Establishments
EU contribution
€ 2 456 600
Principal investigator
Jérôme Jean-Constant Faist (Prof.)
Administrative Contact
Erna Hug (Mrs.)

Beneficiaries (2)

EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZUERICH
Switzerland
EU contribution
€ 2 456 600
Address
Raemistrasse 101
8092 Zuerich
Activity type
Higher or Secondary Education Establishments
Principal investigator
Jérôme Jean-Constant Faist (Prof.)
Administrative Contact
Erna Hug (Mrs.)
CONSIGLIO NAZIONALE DELLE RICERCHE
Italy
EU contribution
€ 39 960
Address
Piazzale Aldo Moro 7
00185 Roma
Activity type
Research Organisations
Administrative Contact
Sara Cibella (Dr.)