Surface wave resonances supported on a square array of square metallic pillars
Hibbins, Alastair P.
Sambles, J. Roy
Applied Physics Letters
A family of transverse-magnetic surface waves is shown to be supported at microwave frequencies by a square array of subwavelength square cross-section metal pillars on a conducting ground plane. These surface waves are experimentally characterised with a collimated microwave beam apparatus that utilises a pair of two-dimensional parabolic mirrors positioned on the sample surface. The dispersion of the modes, each associated with a quantisation of the electromagnetic field in the depth of the slits, is fully characterised and compared with the predictions of finite element modelling.
Copyright © 2012 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 100 (2012) and may be found at http://dx.doi.org/10.1063/1.3691949
Vol. 100 (10), article 101107