Optoelectronics/Quantum Devices

Light-Matter Coupling and cavity-QED with Moiré Excitons in van der Waals Heterostructures

Moiré structures of twisted monolayers of van der Waals materials are a central research area of 2D materials. The DFG priority programme "2DMP" (SPP2244) aims to understand the fascinating physics that takes place between the atomically thin layers in order to develop a fundamental understanding of the electronic and excitonic properties and to understand the role of correlation effects.

This project aims to combine the rich material physics of twisted van der Waals heterobilayers by embedding them in microresonators with a fundamental study of light-matter interactions to investigate and advance the regime of cavity quantum electrodynamics (cQED). We exploit the large oscillator strength of transition metal dichalcogenide monolayers and the ability to manipulate their static dipole moment in vertical heterostructures to create a Bose-Einstein condensate of Moiré exciton polaritons. The tunability of the potential landscape in the Moiré lattice allows us to create spatial correlations between excitons localized in the Moiré potential, thereby controlling the collective emission behavior and generating superradiance. The design of Moiré potential landscapes allows us to explore novel Bose-Hubbard physics, as well as the formation of new topological excitonic states in the regime of strong light-matter coupling.

Quick Info

Acronym2D SPP
Project startNovember 2020
Funding sourceDeutsche Forschungsgemeinschaft (DFG)
Funding IDRE 2974/26-1