期刊
NANO LETTERS
卷 20, 期 3, 页码 2113-2119出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c00125
关键词
Strong coupling regime; exciton-polaritons; polaritonic devices; 2D layered perovskites; metasurfaces; nanophotonics
类别
资金
- French National Research Agency (ANR) [ANR-17-CE24-0020, ANR-18-CE24-0016]
- Agence Nationale de la Recherche (ANR) [ANR-17-CE24-0020] Funding Source: Agence Nationale de la Recherche (ANR)
Exciton-polaritons represent a promising platform for studying quantum fluids of light and realizing prospective all-optical devices. Here we report on the experimental demonstration of exciton-polaritons at room temperature in resonant metasurfaces made from a sub-wavelength two-dimensional lattice of perovskite pillars. The strong coupling regime is revealed by both angular-resolved reflectivity and photoluminescence measurements, showing anticrossing between photonic modes and the exciton resonance with a Rabi splitting in the 200 meV range. Moreover, by tailoring the photonic Bloch mode to which perovskite excitons are coupled, polaritonic dispersions are engineered exhibiting linear, parabolic, and multivalley dispersions. All of our results are perfectly reproduced by both numerical simulations based on a rigorous coupled wave analysis and an elementary model based on a quantum theory of radiation-matter interaction. Our results suggest a new approach to study exciton-polaritons and pave the way toward large-scale and low-cost integrated polaritonic devices operating at room temperature.
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