Innovation area - Photonic systems for quantum control and information processing 

Mie Void Quantum Metasurfaces with 2D TMDs as Scalable Quantum Platform

We aim to combine the tunable and designable properties of 2D semiconductors (TMDs) with nanoscale light manipulation afforded by Mie voids to realize a linear as well as nonlinear quantum photonic platform for tailored quantum emitters. The combination of tailorable emitters with engineerable optical resonances will allow to boost the light-matter interaction and enable manipulation and steering of the emission by utilizing Mie void-based metasurfaces. Ultimately, this will lead to the creation of a highly focused microscale hybrid entangled photon pair source. The precise knowledge about the sample geometry allows to deterministically irradiate the 2D material with focused ion beams, which can generate defects and hence localized emitters in the material at the position of maximum Mie void field enhancement. Our system will represent a paradigm shift towards deterministic, large-scale, industrially fabricable quantum emitters that work at room temperature or at reasonably low temperature Our system is intrinsically extremely compact (size below 50x50 µm²), while being fully compatible with CMOS processes.

Main concept of the proposed scalable quantum platform. Due to the resonant confinement of light in air in the Mie voids, the enhanced fields (red) can be fully accessed. Tuning of the geometry allows to precisely position one of the field hot-spots at the interface, perfectly overlapping with the 2D semiconductor placed on the substrate. This geometry allows not only to increase the interaction of the incident light field with the 2D material, but in a second step also to shape and manipulate the re-radiation from the combined system.
University of Stuttgart
Ulm University