Banzer P, Kindler J, Quabis S, Peschel U, Leuchs G (2010)
Publication Type: Journal article
Publication year: 2010
Book Volume: 18
Pages Range: 10896-10904
Journal Issue: 10
DOI: 10.1364/OE.18.010896
We investigate experimentally the transmission properties of single sub-wavelength coaxial apertures in thin metal films (t = 110 nm). Enhanced transmission through a single sub-wavelength coaxial aperture illuminated with a strongly focused radially polarized light beam is reported. In our experiments we achieved up to four times enhanced transmission through a single coaxial aperture as compared to a (hollow) circular aperture with the same outer diameter.We attribute this enhancement of transmission to the excitation of a TEM-mode for illumination with radially polarized light inside the single coaxial aperture. A strong polarization contrast is observed between the transmission for radially and azimuthally polarized illumination. Furthermore, the observed transmission through a single coaxial aperture can be strongly reduced if surface plasmons are excited. The experimental results are in good agreement with finite difference time domain (FDTD) simulations.
APA:
Banzer, P., Kindler, J., Quabis, S., Peschel, U., & Leuchs, G. (2010). Extraordinary transmission through a single coaxial aperture in a thin metal film. Optics Express, 18(10), 10896-10904. https://doi.org/10.1364/OE.18.010896
MLA:
Banzer, Peter, et al. "Extraordinary transmission through a single coaxial aperture in a thin metal film." Optics Express 18.10 (2010): 10896-10904.
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