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Material properties in the strong light-matter coupling regime

Project description

A new window on the strong coupling of quantum light and matter in a vacuum

Over the last three decades, the physics of strong light–matter coupling has been explored theoretically and, more recently, experimentally. The achievement of weak and strong coupling of quantum light and matter has enabled the increased control of quantum systems and applications in quantum sensing and information processing. Polaritons are mixed light–matter particles arising from the strong coupling between excitons (a bound state of an excited electron and an associated hole) and photons. The light–matter coupling and the resulting polaritons arise from the vacuum conditions of the confined 2D semiconductor microcavity. The EU-funded MaP project is extending the realm of previous investigations into the matter component of the light–matter coupling. An innovative platform promises to shed light on mechanisms responsible for vacuum field-assisted charge transport and phase transitions of matter induced by coupling.

Objective

An electromagnetic mode without photonic excitations still has a non-zero energy - called zero-point energy. The resulting vacuum fluctuations give rise to long known physical effects such as the spontaneous emission. By engineering electromagnetic modes in cavities, vacuum can be made to interact with matter in the extensively studied weak, strong and ultrastrong light-matter coupling regimes. The term `light-matter coupling', as well as the optical experimental means by which the regime is usually studied, hides this important fact: vacuum alone gives rise to the coupling and to the mixed light-matter excitations (polaritons) of the system.
In physics, still only few experimental platforms have allowed to observe `vacuum-matter coupling' without photonic excitations. Properties of materials dressed by a cavity were successfully observed by measuring their conductivity [Orgiu et al. Nat. Mater. 14, 1123 (2015); Paravicini-B. et al. Nat. Phys. 15, 186 (2019)]. In recent years, the new field of polaritonic chemistry has identified other material properties altered by vacuum coupling, including chemical reaction rates and thermodynamic properties.
In this project, we intend to expand the new experimental access to the matter part via conductivity measurements to an entirely new system. So far, only highly disordered organic semiconductors [Orgiu] and very high mobility GaAs based electron gases were used [Paravicini-B.]. Here, we suggest a new platform using transition metal dichalcogenides inside a plasmonic cavity. This should work at room temperature and shed more light on the mechanism responsible for vacuum field assisted charge transport. In a second project, we attempt to alter phase transition properties by dressing a chemical to a cavity. Both projects aim to explore the potential of engineering properties of materials with a cavities vacuum field mode. They both mostly rely on optical, electronic and chemical experimental tools available in the host group.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)

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Call for proposal

(opens in new window) H2020-MSCA-IF-2019

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Coordinator

UNIVERSITE DE STRASBOURG
Net EU contribution
€ 184 707,84
Address
RUE BLAISE PASCAL 4
67081 Strasbourg
France
Region
Grand Est Alsace Bas-Rhin
Activity type
Higher or Secondary Education Establishments
Links
Total cost
€ 184 707,84