Resonant microwave transmission from a double layer of subwavelength metal square arrays: Evanescent handedness

A double layer of identical subwavelength metal patch arrays is experimentally shown to be electromagnetically chiral due to the evanescent coupling of the near fields between nonchiral layers-it exhibits "evanescent handedness." Despite each layer being intrinsically isotropic in the plan...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2012-12, Vol.86 (24), Article 241109
Main Authors: Butler, C. A. M., Hobson, P. A., Hibbins, A. P., Sambles, J. R.
Format: Article
Language:English
Subjects:
Arrays
Condensed matter
Dichroism
Double layer
Handedness
Linear polarization
Microwave transmission
Near fields
Planes
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Summary:A double layer of identical subwavelength metal patch arrays is experimentally shown to be electromagnetically chiral due to the evanescent coupling of the near fields between nonchiral layers-it exhibits "evanescent handedness." Despite each layer being intrinsically isotropic in the plane with four mirror planes orthogonal to the plane of the structure, circular dichroism, leading to significant polarization rotation, is found in the resonant microwave transmission for any incident linear polarization.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.86.241109