Open AccessMulti-modal transmission of microwaves through hole arrays
Author(s) -
James Edmunds,
Euan Hendry,
Alastair P. Hibbins,
J. R. Sambles,
I. Youngs
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.013793
Subject(s) - diffraction , optics , transmission (telecommunications) , microwave , diffraction efficiency , physics , materials science , telecommunications , computer science , quantum mechanics
The microwave transmission through hole arrays in thick metal plates for both large holes (cut-off below onset of diffraction) and small holes (cut-off above onset of diffraction) have been compared through both experiment and modelling. Enhanced transmission is in part mediated by the excitation of diffractively coupled surface waves. Large holes, with cut-off below the onset of diffraction (due to the hole periodicity), are able to support multiple modes in transmission when the depth of the holes is sufficient to support quantisation in the propagation direction. Small holes, with cut-off above the onset of diffraction however only support two coupled surface modes (symmetric and anti-symmetric) below diffraction.