2018/03/12 by Fábio Barachati, Antonio Fieramosca, Soroush Hafezian +11 · 1 citation
Chemistry · Engineering · Physics and Astronomy · #Atomic physics #Blueshift #Chemistry #Condensed matter physics #Dielectric #Materials science #Monolayer #Nanotechnology #Optoelectronics #Photoluminescence #Physics #Plasmonic and Surface Plasmon Research #Polariton #Resonance (particle physics) #Strong Light-Matter Interactions #Thermal Radiation and Cooling Technologies #Transition metal #Tungsten #Tungsten diselenide #Tungsten disulfide #cond-mat.mes-hall #cond-mat.quant-gas
paper · pdf · doi:10.1038/s41565-018-0219-7
published as Nature Nanotechnology 13, 906-909 (2018) · 7 pages, 4 figures
arxiv created 2018/03/12 · openalex publication_date 2018/08/01 · arxiv updated 2018/11/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Atomically thin transition metal dichalcogenides (TMDs) possess a number of properties that make them attractive for realizing room-temperature polariton devices. An ideal platform for manipulating polariton fluids within monolayer TMDs is that of Bloch surface waves, which confine the electric field to a small volume near the surface of a dielectric mirror. Here we demonstrate that monolayer tungsten disulfide (WS2) can sustain Bloch surface wave polaritons (BSWPs) with a Rabi splitting of 43 meV and propagation constants reaching 33 μm. In addition, we evidence strong polariton-polariton nonlinearities within BSWPs, which manifest themselves as a reversible blueshift of the lower polariton resonance by up to 12.9±0.5 meV. Such nonlinearities are at the heart of polariton devices and have not yet been demonstrated in TMD polaritons. As a proof of concept, we use the nonlinearity to implement a nonlinear polariton source. Our results demonstrate that BSWPs using TMDs can support long-range propagation combined with strong nonlinearities, enabling potential applications in integrated optical processing and polaritonic circuits.