In-plane focusing of terahertz surface waves on a gradient index metamaterial film.


We designed and implemented a gradient index metasurface for in-plane focusing of confined terahertz (THz) surface waves. We measured the spatial propagation of the surface waves by two-dimensional mapping of the complex electric field using a THz near-field spectroscope. The surface waves were focused to a diameter of 500 μm after a focal length of… (More)
DOI: 10.1364/OL.38.002156


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