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The Quest for Ultimate Electromagnetics using Spatial Transformations (QUEST)
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Paper "Thin Metamaterial Luneburg Lens for Surface Waves" published in Physical Review B
Research on surface wave Luneburg lenses performed at Exeter under QUEST has been published in the journal Physical Review B.
In this work, a low loss, thin (1/14th of the free space wavelength), omnidirectional surface-wave Luneburg lens was fabricated and characterised at microwave frequencies. A Luneburg lens is a device that allows incoming plane waves to be focussed to a point or, conversely, converts out-going waves from a point source to plane waves.
This is an expansion of the earlier work that won a prize at NanoMeta13.