Optical properties of a nanosized hole in a thin metallic film
| Autor: | Nikolay A. Mirin, Tae-Ho Park, Naomi J. Halas, Peter Nordlander, Colleen L. Nehl, J. Britt Lassiter |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
business.industry Surface plasmon General Engineering Nanophotonics Physics::Optics General Physics and Astronomy Dispersion curve Metal visual_art visual_art.visual_art_medium Optoelectronics General Materials Science Thin film business Plasmonic nanostructures Excitation Optical resonance |
| Zdroj: | ACS nano. 2(1) |
| ISSN: | 1936-086X |
| Popis: | Subwavelength holes are one of the most important structures in nanophotonics, providing a useful geometry for nanosensing and giving rise to extraordinary transmission when patterned in arrays. Here we theoretically and experimentally examine the optical properties of an individual nanohole in a thin metallic film. In contrast to localized plasmonic nanostructures with their own characteristic resonances, nanoholes provide a site for excitation of the underlying thin film surface plasmons. We show that both hole diameter and film thickness determine the energy of the optical resonance. A theoretical dispersion curve was obtained and verified using spectral measurements of individual nanoholes. |
| Databáze: | OpenAIRE |
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