Abstract
We demonstrate the strong coupling between excitons in organic molecules and all-dielectric metasurfaces formed by arrays of silicon nanoparticles supporting Mie surface lattice resonances (MSLRs). Compared to Mie resonances in individual nanoparticles, MSLRs have extended mode volumes and much larger quality factors, which enables to achieve collective strong coupling with very large coupling strengths and Rabi energies. Moreover, due to the electric and magnetic character of the MSLR given by the Mie resonance, we show that the hybridization of the exciton with the MSLR results in exciton-polaritons that inherit this character as well. Our results demonstrate the potential of all-dielectric metasurfaces as novel platform to investigate and manipulate exciton-polaritons in low-loss polaritonic devices.
Highlights
The use of dielectric metasurfaces supporting Mie resonances as optical cavities to control light-matter interactions has triggered many interesting works in the last years
We demonstrate experimentally the strong coupling between excitons in organic molecules and alldielectric metasurfaces formed by arrays of polycrystalline silicon nanoparticles supporting Mie surface lattice resonances (MSLRs) with electric and magnetic character.[3]
To characterize the optical response of the MSLRs we measure the extinction as function of the incident in-plane moment k|| (k2= k||2 + kz2) of the metasurface with a deposited layer of poly(methyl methacrylate) (PMMA) with a thickness of t = 290±10 nm
Summary
The use of dielectric metasurfaces supporting Mie resonances as optical cavities to control light-matter interactions has triggered many interesting works in the last years. Due to the low absorption losses and the presence of resonances with both electric and magnetic character, dielectric metasurfaces have an exciting prospect for the development of novel applications.
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