Enhanced microwave transmission through a patterned metal film
Kelly, Robert J.
Lockyear, Matthew J.
Suckling, James R.
Sambles, J. Roy
Lawrence, Christopher R.
University of Exeter; QinetiQ Ltd, Farnborough
Applied Physics Letters
American Institute of Physics
Selective transmission of radiation through a two-dimensional array of subwavelength slits in an otherwise opaque thin metal film is presented at microwave frequencies. Individual slits are modified with the addition of perpendicular cuts, which interestingly and perhaps counterintuitively leads to resonant transmission when the incident radiation is polarized parallel to the slits. Finite element modeling of the structure shows the transmission of radiation polarized parallel to the slit direction to be a result of induced surface currents exciting a zeroth-order Fabry-Pérot mode.
Copyright © 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters 90 (2007) and may be found at http://link.aip.org/link/?APPLAB/90/223506/1
90 (22), article 223506