Abstract
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 language | English |
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Pages (from-to) | 19196-19203 |
Number of pages | 8 |
Journal | Journal of Physical Chemistry C |
Volume | 124 |
Issue number | 35 |
DOIs | |
Publication status | Published - 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.
Keywords
- Physics - Optics