Photonics Research, 2020, 8 (12): 12000A91, Published Online: Nov. 13, 2020  

Engineering a light–matter strong coupling regime in perovskite-based plasmonic metasurface: quasi-bound state in the continuum and exceptional points Download: 698次

Author Affiliations
1 Université de Lyon, Institut des Nanotechnologies de Lyon, INL/CNRS, Ecole Centrale de Lyon, 36 avenue Guy de Collongue, 69130 Ecully, France
2 College of Engineering and Computer Science, VinUniversity, Hanoi 14000, Vietnam
3 Université de Lyon, Institut des Nanotechnologies de Lyon, INL/CNRS, INSA-Lyon, 7 avenue Jean Capelle, 69621 Villeurbanne, France
4 Institut Universitaire de France (IUF), Paris, France
Abstract
We present theoretically the formation of exciton–photon polaritons and exciton-surface plasmon polaritons in a perovskite-based subwavelength lattice on the metallic plane. It is shown that the later polaritons will be achieved as the perovskite layer is ultra-thin (<50 nm), while the co-existence of both polaritons will dominate, as the thickness of the perovskite metasurface approaches wavelength-scale. In the two cases, the lower polaritonic branches consist of dark and bright modes corresponding to infinite and finite radiative quality factors, respectively. Another salient property in this work is that it allows one to obtain exceptional points (EPs) in momentum space with a four-fold enhancement of local density of states through engineering the perovskite metasurface. Our findings show that the perovskite metasurface is an attractive and rich platform to make polaritonic devices, even with the presence of a lossy metallic layer.

Leran Lu, Quynh Le-Van, Lydie Ferrier, Emmanuel Drouard, Christian Seassal, Hai Son Nguyen. Engineering a light–matter strong coupling regime in perovskite-based plasmonic metasurface: quasi-bound state in the continuum and exceptional points[J]. Photonics Research, 2020, 8(12): 12000A91.

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