Direct near-field mapping of nano-sphere-excited leaky surface modes atanisotropic metasurface:Paper
| Autor: | Walla, F., Bürkle, F., Sinev, I., Bogdanov, Andrey, Komissarenko, F., Soltani, Alinaghi, Malureanu, Radu, Lavrinenko, A.V., Roskos, H. G. |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Walla, F, Bürkle, F, Sinev, I, Bogdanov, A, Komissarenko, F, Soltani, A, Malureanu, R, Lavrinenko, A V & Roskos, H G 2018, ' Direct near-field mapping of nano-sphere-excited leaky surface modes atanisotropic metasurface : Paper ', Journal of Physics: Conference Series, vol. 1092, no. 1, 012165 . https://doi.org/10.1088/1742-6596/1092/1/012165 |
| DOI: | 10.1088/1742-6596/1092/1/012165 |
| Popis: | Leaky surface modes on an ultra-thin anisotropic gold metasurface are directly observed through scattering-type scanning near-field optical microscopy (s-SNOM). Surface modes are excited by focussing light onto a resonant silicon nano-sphere positioned on the surface by nano-manipulation under electron-beammonitoring. The light scattered from the nano-sphere is ableto excitesurface modes with a broad range of wavevectors. The asymmetric air-metasurface-insulator structure supports a leaky surface mode which is confined at the top interface and leaks into the higher-index substrate. s-SNOM near-field mapping of the leaky surface wave is in good agreement with the results of the full-wave simulationsof the electro-magnetic modes on the structure. |
| Databáze: | OpenAIRE |
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