2 September 2009 Polarization dependent terahertz spectroscopy of a single subwavelength hole in thin metallic film
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Abstract
We theoretically and experimentally investigate the optical properties of a subwavelength hole in a thin metallic film. The microscopic origin of the hole plasmon resonance is a collective state formed by propagating thin film surface plasmons of wavelengths equal to integer fractions of the hole diameter. We show that the plasmon resonance depend strongly on the polarization of the incident light. We also, using time-domain terahertz spectroscopy, demonstrate the first experimental observation of the optical coupling between antibonding film plasmon modes and perpendicularly polarized light to the film surface.
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Tae-Ho Park, Joong-Wook Lee, Daniel M. Mittleman, Peter Nordlander, "Polarization dependent terahertz spectroscopy of a single subwavelength hole in thin metallic film", Proc. SPIE 7394, Plasmonics: Metallic Nanostructures and Their Optical Properties VII, 73940F (2 September 2009); doi: 10.1117/12.826548; https://doi.org/10.1117/12.826548
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