Paper
26 August 2008 Near-field studies of surface plasmon generation: optical and terahertz studies
H. W. Kihm, K. G. Lee, M. A. Seo, K. J. Ahn, A. J. L. Adam, J. H. Kang, Q. H. Park, P. C. M. Planken, D. S. Kim
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Abstract
We study the dielectric constant dependent diffraction phenomena of single slit apertures, both theoretically and experimentally. We experimentally simulate perfect metal and real metal cases by investigating subwavelength diffraction by a single slit, both in nano-optical and in terahertz regimes, keeping the slit-width/wavelength ratio approximately the same for both of frequency regimes. The wave-front in optical regime separates itself into forward propagating beam and surface-bound 90-degree diffracted wave, i.e., surface plasmon polaritons; while the separation of modes is not observed in terahertz regime.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
H. W. Kihm, K. G. Lee, M. A. Seo, K. J. Ahn, A. J. L. Adam, J. H. Kang, Q. H. Park, P. C. M. Planken, and D. S. Kim "Near-field studies of surface plasmon generation: optical and terahertz studies", Proc. SPIE 7032, Plasmonics: Metallic Nanostructures and Their Optical Properties VI, 70321P (26 August 2008); https://doi.org/10.1117/12.794362
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KEYWORDS
Terahertz radiation

Near field optics

Near field

Metals

Gold

Light scattering

Near field scanning optical microscopy

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