Journal
NATURE COMMUNICATIONS
Volume 8, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms15624
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Funding
- European Commission under the Graphene Flagship (GrapheneCore1) [696656]
- Marie Sklodowska-Curie individual fellowship [SGPCM-705960]
- ERC starting grant SPINTROS [257654]
- ERC starting grant 2DNANOPTICA [715496]
- Spanish Ministry of Economy and Competitiveness [FIS2014-60195-JIN, MAT2014-53432-C5-4-R, MAT2015-65525-R, MAT2012-37638, MAT2015-65159-R]
- Basque government [PRE-2016-1-0150]
- Regional Council of Gipuzkoa [100/16]
- European Research Council (ERC) [257654, 715496] Funding Source: European Research Council (ERC)
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Polaritons in layered materials-including van der Waals materials-exhibit hyperbolic dispersion and strong field confinement, which makes them highly attractive for applications including optical nanofocusing, sensing and control of spontaneous emission. Here we report a near-field study of polaritonic Fabry-Perot resonances in linear antennas made of a hyperbolic material. Specifically, we study hyperbolic phonon-polaritons in rectangular waveguide antennas made of hexagonal boron nitride (h-BN, a prototypical van der Waals crystal). Infrared nanospectroscopy and nanoimaging experiments reveal sharp resonances with large quality factors around 100, exhibiting atypical modal near-field patterns that have no analogue in conventional linear antennas. By performing a detailed mode analysis, we can assign the antenna resonances to a single waveguide mode originating from the hybridization of hyperbolic surface phonon-polaritons (Dyakonov polaritons) that propagate along the edges of the h-BN waveguide. Our work establishes the basis for the understanding and design of linear waveguides, resonators, sensors and metasurface elements based on hyperbolic materials and metamaterials.
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