| Autor: |
Lee, Seong Won, Lee, Jong Seok, Choi, Woo Hun, Gong, Su‐Hyun |
| Předmět: |
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| Zdroj: |
Advanced Optical Materials; Aug2023, Vol. 11 Issue 16, p1-8, 8p |
| Abstrakt: |
Light confinement to sub‐wavelength scales is actively studied for nanophotonic applications because it gives rise to intriguing optical properties with enhanced light‐matter interaction. Herein, an ultrathin exciton–polariton waveguide based on a WS2 multilayer is proposed for sub‐wavelength light guiding. A WS2 waveguide supports guided exciton–polariton modes even with a few tens of nanometers of thickness. It is theoretically confirmed that the WS2 waveguide has significantly lower propagation loss than a plasmonic mode, although its thickness may be similar to that of a plasmonic waveguide. By injecting white light into a fabricated WS2 waveguide, light guiding is experimentally demonstrated through a 20 nm thick WS2 waveguide. Notably, this study integrated the WS2 waveguide with a WSe2 monolayer to demonstrate the coupling of monolayer emission to the polariton waveguide. The results suggest that WS2 multilayers provide a novel material platform with potential for nanophotonic applications, including ultrathin optical integrated circuits. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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