Transition metal dichalcogenide nanodisks as high-index dielectric Mie nanoresonators
Artikel i vetenskaplig tidskrift, 2019

Monolayer transition metal dichalcogenides (TMDCs) have recently been proposed as an excitonic platform for advanced optical and electronic functionalities 1–3 . However, in spite of intense research efforts, it has not been widely appreciated that TMDCs also possess a high refractive index 4,5 . This characteristic opens up the possibility to utilize them to construct resonant nanoantennas based on subwavelength geometrical modes 6,7 . Here, we show that nanodisks, fabricated from exfoliated multilayer WS 2 , support distinct Mie resonances and anapole states 8 that can be tuned in wavelength over the visible and near-infrared range by varying the nanodisk size and aspect ratio. As a proof of concept, we demonstrate a novel regime of light–matter interaction—anapole-exciton polaritons—which we realize within a single WS 2 nanodisk. We argue that the TMDC material anisotropy and the presence of excitons enrich traditional nanophotonics approaches based on conventional high-index materials and/or plasmonics.


Ruggero Verre

Chalmers, Fysik, Bionanofotonik

Denis Baranov

Chalmers, Fysik, Bionanofotonik

Battulga Munkhbat

Chalmers, Fysik, Bionanofotonik

Jorge Cuadra

Chalmers, Fysik, Bionanofotonik

Mikael Käll

Chalmers, Fysik, Bionanofotonik

Timur Shegai

Chalmers, Fysik, Bionanofotonik

Nature Nanotechnology

1748-3387 (ISSN) 1748-3395 (eISSN)

Vol. 14 7 679-683


Atom- och molekylfysik och optik

Annan fysik

Den kondenserade materiens fysik





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