Near-field imaging of surface-plasmon vortex-modes around a single elliptical nanohole in a gold film

Abstract We present scanning near-field images of surface plasmon modes around a single elliptical nanohole in 88 nm thick Au film. We find that rotating surface plasmon vortex modes carrying extrinsic orbital angular momentum can be induced under linearly polarized illumination. The vortex modes ar...

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Autores principales: Claudia Triolo, Salvatore Savasta, Alessio Settineri, Sebastiano Trusso, Rosalba Saija, Nisha Rani Agarwal, Salvatore Patanè
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2019
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Acceso en línea:https://doaj.org/article/30aae2e26f3242d493de0b9686869d02
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