Fano resonances and electromagnetically induced transparency in silicon waveguides loaded with plasmonic nanoresonators
The fundamental electric dipolar resonance of metallic nanostrips placed on top of a dielectric waveguide can be excited via evanescent wave coupling, thus giving rise to broad dips in the transmission spectrum of the waveguide. Here we show via numerical simulations that narrower and steeper Fano-l...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/79247 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/79247 |
| Access Level: | acceso abierto |
| Palabra clave: | Silicon waveguides Fano resonances Nanoantennas TEORIA DE LA SEÑAL Y COMUNICACIONES |
| Sumario: | The fundamental electric dipolar resonance of metallic nanostrips placed on top of a dielectric waveguide can be excited via evanescent wave coupling, thus giving rise to broad dips in the transmission spectrum of the waveguide. Here we show via numerical simulations that narrower and steeper Fano-like resonances can be obtained by asymmetrically coupling in the near field a larger nanostrip supporting an electric quadrupole in the frequency regime of interest to the original, shorter nanostrip. Under certain conditions, the spectral response corresponding to the electromagnetically induced transparency phenomenon is observed. We suggest that this hybrid plasmonic photonic approach could be especially relevant for sensing or all-optical switching applications in a photonic integrated platform such as silicon photonics. |
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