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

作     者：LERAN LU QUYNH LE-VAN LYDIE FERRIER EMMANUEL DROUARD CHRISTIAN SEASSAL HAI SON NGUYEN 

作者机构：Universitéde LyonInstitut des Nanotechnologies de LyonINL/CNRSEcole Centrale de Lyon36 avenue Guy de Collongue69130 EcullyFrance College of Engineering and Computer ScienceVinUniversityHanoi 14000Vietnam Universitéde LyonInstitut des Nanotechnologies de LyonINL/CNRSINSA-Lyon7 avenue Jean Capelle69621 VilleurbanneFrance Institut Universitaire de France(IUF)ParisFrance 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2020年第8卷第12期

页      面：I0005-I0014页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：Agence Nationale de la Recherche(ANR-17-CE24-0020,ANR-18-CE24-0016) Region Auvergne-Rhone-Alpes(PAI2020-2000671101) This work is partly supported by the French National Research Agency(ANR)under the project POPEYE(ANR-17-CE24-0020) project EMIPERO(AN R-18-CE24-0016) It is also supported by the Auvergne-Rhone-Alpes region in the framework of PAI2020 

主　　题：surface. perovskite exceptional 

摘      要：We present theoretically the formation of exciton–photon polaritons and exciton-surface plasmon polaritons in a perovskite-based subwavelength lattice on the metallic *** 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 *** the two cases,the lower polaritonic branches consist of dark and bright modes corresponding to infinite and finite radiative quality factors,*** 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 *** 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.