Long-Range Ballistic Propagation of 80% Excitonic Fraction Polaritons in a Perovskite Metasurface at Room Temperature.

Autor:	Dang NHM; Université Lyon, Ecole Centrale de Lyon, CNRS, INSA Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, INL, UMR5270, Ecully 69130, France., Zanotti S; Dipartimento di Fisica, Università di Pavia, via Bassi 6, I-27100 Pavia, Italy., Drouard E; Université Lyon, Ecole Centrale de Lyon, CNRS, INSA Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, INL, UMR5270, Ecully 69130, France., Chevalier C; Université Lyon, Ecole Centrale de Lyon, CNRS, INSA Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, INL, UMR5270, Ecully 69130, France., Trippé-Allard G; Université Paris-Saclay, ENS Paris-Saclay, CentraleSupélec, CNRS, Lumière, Matière et Interfaces (LuMIn) Laboratory, 91190 Gif-sur-Yvette, France., Deleporte E; Université Paris-Saclay, ENS Paris-Saclay, CentraleSupélec, CNRS, Lumière, Matière et Interfaces (LuMIn) Laboratory, 91190 Gif-sur-Yvette, France., Seassal C; Université Lyon, Ecole Centrale de Lyon, CNRS, INSA Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, INL, UMR5270, Ecully 69130, France., Gerace D; Dipartimento di Fisica, Università di Pavia, via Bassi 6, I-27100 Pavia, Italy., Nguyen HS; Université Lyon, Ecole Centrale de Lyon, CNRS, INSA Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, INL, UMR5270, Ecully 69130, France.; Institut Universitaire de France (IUF), 75231 Paris, France.
Jazyk:	angličtina
Zdroj:	Nano letters [Nano Lett] 2024 Sep 25; Vol. 24 (38), pp. 11839-11846. Date of Electronic Publication: 2024 Sep 13.
DOI:	10.1021/acs.nanolett.4c02696
Abstrakt:	Exciton-polaritons, hybrid light-matter excitations arising from the strong coupling between excitons in semiconductors and photons in photonic nanostructures, are crucial for exploring the physics of quantum fluids of light and developing all-optical devices. Achieving room temperature propagation of polaritons with a large excitonic fraction is challenging but vital, e.g., for nonlinear light transport. We report on room temperature propagation of exciton-polaritons in a metasurface made from a subwavelength lattice of perovskite pillars. The large Rabi splitting, much greater than the optical phonon energy, decouples the lower polariton band from the phonon bath of the perovskite. These cooled polaritons, in combination with the high group velocity achieved through the metasurface design, enable long-range propagation, exceeding hundreds of micrometers even with an 80% excitonic component. Furthermore, the design of the metasurface introduces an original mechanism for unidirectional propagation through polarization control, suggesting a new avenue for the development of advanced polaritonic devices.
Databáze:	MEDLINE
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