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SYPE: Symposium Polaritonic Effects in Molecular Systems

SYPE 1: Polaritonic Effects in Molecular Systems

SYPE 1.4: Hauptvortrag

Dienstag, 11. März 2025, 12:30–13:00, HS 1+2

Strong light-matter coupling: from self-hybridized polaritons to Casimir self-assembly — •Timur Shegai — Department of Physics, Chalmers University of Technology, 412 96, Gothenburg, Sweden

In this talk, I will give an overview of several nanophotonic systems that support polaritons, as well as demonstrate their potential usefulness in applications. I will start with transition metal dichalcogenides (TMDs) and discuss the concept of self-hybridization, a scenario in which both light and matter subparts in a polaritonic system are supported by the same (nano)structured material (1-4). We have recently demonstrated such self-hybridization in TMD nanostructures (1-4) and levitating water droplets (4-5). The latter is interesting, due to the abundance of water droplets in natural systems, including mists, fogs, and clouds. Furthermore, I will show that Fabry-Pérot resonators, one of the most important workhorses of nanophotonics, can spontaneously form in an aqueous solution of gold nanoflakes (6-8). This effect is possible due to the intricate balance between attractive Casimir-Lifshitz forces and repulsive electrostatic forces acting between the flakes.

(1) Nat. Commun., 11, 4604, (2020) (2) Laser & Photonics Rev., 17, 2200057, (2023) (3) Nat. Photon., 18, 751-757, (2024) (4) J. Chem. Phys., 154, 024701, (2021) (5) Phys. Rev. Lett., 132, 193804, (2024) (6) Nature, 597, 214-219, (2021) (7) Nat. Phys., 19, 271-278, (2023) (8) Sci. Adv., 10, eadn1825, (2024)