Abstract：
:Linearly polarized microwave radiation is shown to have its plane of polarization converted to the orthogonal state upon reflection from an ultrathin (λ/25) cavity array. The structure benefits from an uncomplicated design consisting of a metallic grating closely separated from a ground plane by a dielectric spacer. A single set of periodically spaced slits (monograting) exhibits polarization conversion when the normally incident electric field is aligned at 45° to the slits. Two orthogonal sets of slits (bigrating) allows this narrow-band effect to be broadened when the two orthogonal resonances are separated in frequency. We optimise the design and experimentally demonstrate near loss-less polarization conversion (95% of the incident intensity) across a 3.1 GHz frequency band. Finally, we study the dependence of the structure's performance on incident angle and slit width.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Tremain B,Rance HJ,Hibbins AP,Sambles JRdoi
10.1038/srep09366subject
Has Abstractpub_date
2015-03-23 00:00:00pages
9366issn
2045-2322pii
srep09366journal_volume
5pub_type
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