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Q: Fachverband Quantenoptik und Photonik
Q 45: Plasmonics and Metasurfaces
Q 45.4: Vortrag
Donnerstag, 5. März 2026, 12:00–12:15, P 3
Periodic light meets periodic matter — •Frieder Lindel1,2,3, Carlos J. Sánchez Martínez1,2, Johannes Feist1,2, and Francisco García-Vidal1,2 — 1Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, Spain — 2Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Spain — 3Institute for Theoretical Physics, ETH Zürich, Switzerland
Strong light-matter coupling is a key requirement for many quantum technologies, typically achieved through field enhancement in optical cavities or antennas. It leads to the hybridisation of light and matter excitations into polaritons.
In my talk, the concept of crystal polaritons will be introduced [1], which arise when collective excitations of periodic arrays of quantum emitters are strongly coupled to the light modes supported by a metasurface. We will construct an ab initio few-mode quantization scheme for metasurface resonances based on macroscopic quantum electrodynamics, which provides a framework for analyzing the emergence of strong light-matter coupling in metasurfaces and the formation of crystal polaritons. We will see how the interactions between crystal polaritons lead to single photon nonlinearities for extremely low polariton densities, allowing resonant quantum light generation orders of magnitude higher than in state-of-the-art nonlinear metasurfaces.
[1] F. Lindel, C. J. S. Martínez, J. Feist, F. J. Garcia-Vidal, arXiv preprint: arXiv:2508.00797 (2025).
Keywords: Nanophotonics; Cavity QED; Metasurfaces; Photon statistics