Collective Mie Exciton-Polaritons in an Atomically Thin Semiconductor

Shaojun Wang (Corresponding author), T. V. Raziman, Shunsuke Murai, Gabriel W. Castellanos, Ping Bai, Anton Matthijs Berghuis, Rasmus H. Godiksen, Alberto G. Curto, Jaime Gómez Rivas (Corresponding author)

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Optically induced Mie resonances in dielectric nanoantennas feature low dissipative losses and large resonant enhancement of both electric and magnetic fields. They offer an alternative platform to plasmonic resonances to study light-matter interactions from the weak to the strong coupling regimes. Here, we experimentally demonstrate the strong coupling of bright excitons in monolayer WS$_2$ with Mie surface lattice resonances (Mie-SLRs). We resolve both electric and magnetic Mie-SLRs of a Si nanoparticle array in angular dispersion measurements. At the zero detuning condition, the dispersion of electric Mie-SLRs (e-SLRs) exhibits a clear anti-crossing and a Rabi-splitting of 32 meV between the upper and lower polariton bands. The magnetic Mie-SLRs (m-SLRs) nearly cross the energy band of excitons. These results suggest that the field of m-SLRs is dominated by out-of-plane components that do not efficiently couple with the in-plane excitonic dipoles of the monolayer WS$_2$. In contrast, e-SLRs in dielectric nanoparticle arrays with relatively high quality factors (Q $\sim$ 120) facilitate the formation of collective Mie exciton-polaritons, and may allow the development of novel polaritonic devices which can tailor the optoelectronic properties of atomically thin two-dimensional semiconductors.
Original languageEnglish
Pages (from-to)19196-19203
Number of pages8
JournalJournal of Physical Chemistry C
Issue number35
Publication statusPublished - 3 Sept 2020

Bibliographical note

Funding Information:
The authors thank the Innovational Research Incentives Schemes of the Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) (Vici Grant 680-47-628 and Gravitation Grant 024.002.033) and the Ministry of Education, Culture, Sports, Science, and Technology (MEXT, Japan) (nos. 17KK0133 and 19H02434) for financial support. S.W. was supported by the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions. Numerical simulations in this work were carried out on the Dutch national e-infrastructure with the support of the SURF Cooperative.

Publisher Copyright:
Copyright © 2020 American Chemical Society.


  • Physics - Optics


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