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Extraordinary transmission through a single coaxial aperture in a thin metal film

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/persons/resource/persons201008

Banzer,  P.
International Max Planck Research School, Max Planck Institute for the Science of Light, Max Planck Society;
Interference Microscopy and Nanooptics, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201152

Peschel,  U.
Nonlinear Optics and Nanophotonics, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201115

Leuchs,  G.
Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Banzer, P., Kindler (nee Mueller), 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. doi:10.1364/OE.18.010896.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6B03-7
Abstract
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. (C)2010 Optical Society of America