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Strong Plasmon–Exciton Interactions on Nanoantenna Array–Monolayer WS 2 Hybrid System
Author(s) -
Liu Lin,
Tobing Landobasa Y. M.,
Yu Xuechao,
Tong Jinchao,
Qiang Bo,
FernándezDomínguez Antonio I.,
GarciaVidal Francisco J.,
Zhang Dao Hua,
Wang Qi Jie,
Luo Yu
Publication year - 2020
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201901002
Subject(s) - exciton , plasmon , monolayer , materials science , dipole , optoelectronics , planar , coupling (piping) , electric field , condensed matter physics , nanotechnology , physics , computer graphics (images) , quantum mechanics , computer science , metallurgy
Strong plasmon–exciton interactions in monolayer transition‐metal dichalcogenides (TMDs) is emerging as a promising material platform for light emissions, nonlinear optics, and quantum communications, and their realizations require highly localized electric fields parallel to the transition dipole moment of TMD excitons. Here, a systematic study of light–matter interaction in planar dimer nanoantenna of nanoscale gaps coupled with monolayer WS 2 is presented, where the effects of the local field enhancement and spatial mode overlap in the plasmon–exciton coupling strength are experimentally investigated. Importantly, anticrossing behaviors in the strong coupling regime with a Rabi splitting of Ω = 118 meV for gold bowtie antennas with 7 nm gaps and Ω = 138 meV for gold dimer arrays with 10 nm gaps are demonstrated.