Thursday, June 13, 2013

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


 
http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-38-12-2156

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 approximately 2 mm. In the focus, we measured a field amplitude enhancement of a factor of 3.
© 2013 Optical Society of America

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