2D Materials – Physics of van der Waals [hetero]structures
DFG Priority program 2244
Light-matter coupling and cavity-QED with Moiré excitons in van der Waals heterostructures
Christopher Gies, Universität Bremen, gies (at) itp.uni-bremen.de [webpage]
Christian Schneider, Carl von Ossietzky Universität Oldenburg, christian.schneider (at) uol.de
Stephan Reitzenstein, Technische Universität Berlin, stephan.reitzenstein (at) physik.tu-berlin.de [webpage]
This project aims to combine the rich material physics of twisted heterostructures of van der Waals materials with light-matter interaction in the regime of cavity quantum electrodynamics. Taking advantage of the giant oscillator strength of excitons in transition metal dichalcogenide layers and the capability to manipulate their static dipole moment in stacked heterostructures, we will explore condensation of Moiré-exciton polaritons, the formation of topological excitons, and new regimes of Bose-Hubbard physics. Furthermore, we will tune the Moiré potential landscape to tailor spatial correlations between localized excitons to control collective emission effects giving rise to superradiance in unprecedented ways.
Our project consortium brings together experimental and theoretical partners specializing in polariton and cavity-QED physics. Our methods span the whole range of controlled van der Waals layering, monolithic and open cavity design, quantum-optical spectroscopy down to the individual-photon level, hyperspectral imaging, phase resolved interference spectroscopy and microscopic modelling.