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

Banzer, Peter; Kindler, Jochen; Quabis, Susanne; Peschel, Ulf; Leuchs, Gerd (2010). Extraordinary transmission through a single coaxial aperture in a thin metal film. Optics express, 18(10), pp. 10896-904. Washington, D.C.: Optical Society of America 10.1364/OE.18.010896

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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.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology

UniBE Contributor:

Kindler, Jochen




Optical Society of America




Factscience Import

Date Deposited:

04 Oct 2013 14:14

Last Modified:

17 Mar 2015 19:17

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PubMed ID:


Web of Science ID:



https://boris.unibe.ch/id/eprint/3365 (FactScience: 207034)

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