Visible-frequency hyperbolic plasmon polaritons in a natural van der Waals crystal
Abstract Controlling light at subwavelength scales is crucial in nanophotonics. Hyperbolic polaritons, supporting arbitrarily large wavevectors, enable extreme light confinement beyond the diffraction limit. Traditional hyperbolic metamaterials suffer from high losses due to metallic components, whi...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-11-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-53988-7 |
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| _version_ | 1846171816806055936 |
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| author | Giacomo Venturi Andrea Mancini Nicola Melchioni Stefano Chiodini Antonio Ambrosio |
| author_facet | Giacomo Venturi Andrea Mancini Nicola Melchioni Stefano Chiodini Antonio Ambrosio |
| author_sort | Giacomo Venturi |
| collection | DOAJ |
| description | Abstract Controlling light at subwavelength scales is crucial in nanophotonics. Hyperbolic polaritons, supporting arbitrarily large wavevectors, enable extreme light confinement beyond the diffraction limit. Traditional hyperbolic metamaterials suffer from high losses due to metallic components, while natural low-loss hyperbolic phonon polaritons are limited to the mid-infrared range. Some hyperbolic materials at visible frequencies have been studied, but they are either very lossy or only feature out-of-plane hyperbolicity. Here, we demonstrate the presence of low-loss, in-plane hyperbolic plasmon polaritons in the visible and near-infrared in thin-films of MoOCl2, a natural van der Waals crystal. The polariton dispersion is predicted based on the framework of light propagation in biaxial media and experimentally confirmed by real space nano imaging on exfoliated flakes. MoOCl2 constitutes an ideal material platform for visible range applications leveraging the unboundedness of hyperbolic modes, such as hyperlensing, Purcell factor enhancement, and super-resolution imaging, without the drawbacks of metamaterials. |
| format | Article |
| id | doaj-art-6cf7cd46fab24281aba750b8d58b3b6e |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-6cf7cd46fab24281aba750b8d58b3b6e2024-11-10T12:32:59ZengNature PortfolioNature Communications2041-17232024-11-011511910.1038/s41467-024-53988-7Visible-frequency hyperbolic plasmon polaritons in a natural van der Waals crystalGiacomo Venturi0Andrea Mancini1Nicola Melchioni2Stefano Chiodini3Antonio Ambrosio4Centre for Nano Science and Technology, Fondazione Istituto Italiano di TecnologiaCentre for Nano Science and Technology, Fondazione Istituto Italiano di TecnologiaCentre for Nano Science and Technology, Fondazione Istituto Italiano di TecnologiaCentre for Nano Science and Technology, Fondazione Istituto Italiano di TecnologiaCentre for Nano Science and Technology, Fondazione Istituto Italiano di TecnologiaAbstract Controlling light at subwavelength scales is crucial in nanophotonics. Hyperbolic polaritons, supporting arbitrarily large wavevectors, enable extreme light confinement beyond the diffraction limit. Traditional hyperbolic metamaterials suffer from high losses due to metallic components, while natural low-loss hyperbolic phonon polaritons are limited to the mid-infrared range. Some hyperbolic materials at visible frequencies have been studied, but they are either very lossy or only feature out-of-plane hyperbolicity. Here, we demonstrate the presence of low-loss, in-plane hyperbolic plasmon polaritons in the visible and near-infrared in thin-films of MoOCl2, a natural van der Waals crystal. The polariton dispersion is predicted based on the framework of light propagation in biaxial media and experimentally confirmed by real space nano imaging on exfoliated flakes. MoOCl2 constitutes an ideal material platform for visible range applications leveraging the unboundedness of hyperbolic modes, such as hyperlensing, Purcell factor enhancement, and super-resolution imaging, without the drawbacks of metamaterials.https://doi.org/10.1038/s41467-024-53988-7 |
| spellingShingle | Giacomo Venturi Andrea Mancini Nicola Melchioni Stefano Chiodini Antonio Ambrosio Visible-frequency hyperbolic plasmon polaritons in a natural van der Waals crystal Nature Communications |
| title | Visible-frequency hyperbolic plasmon polaritons in a natural van der Waals crystal |
| title_full | Visible-frequency hyperbolic plasmon polaritons in a natural van der Waals crystal |
| title_fullStr | Visible-frequency hyperbolic plasmon polaritons in a natural van der Waals crystal |
| title_full_unstemmed | Visible-frequency hyperbolic plasmon polaritons in a natural van der Waals crystal |
| title_short | Visible-frequency hyperbolic plasmon polaritons in a natural van der Waals crystal |
| title_sort | visible frequency hyperbolic plasmon polaritons in a natural van der waals crystal |
| url | https://doi.org/10.1038/s41467-024-53988-7 |
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