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Metamaterial-based optical components for THz radiation

: Neu, J.; Krolla, B.; Paul, O.; Reinhard, B.; Weis, P.; Wollrab, V.; Pomar, J.-L.G.; Beigang, R.; Rahm, M.


International Union of Radio Science -URSI-:
XXXth URSI general assembly and scientific symposium, URSI GASS 2011. Vol.2 : Istanbul, Turkey, 13 -20 August 2011
Piscataway/NJ: IEEE, 2011
ISBN: 978-1-4244-5117-3
ISBN: 978-1-4244-6051-9
Art. 6050611
International Union of Radio Science (General Assembly and Scientific Symposium) <30, 2011, Istanbul>
Fraunhofer IPM ()

We present different metamaterial-based optical components that open exciting new ways to deliberately manipulate the spatial or spectral properties of terahertz (THz) radiation. The central scope of the paper is the design, fabrication and optical characterization of a 3-layer gradient index (GRIN) lens that allows one to strongly focus THz radiation to a spot diameter in the order of one wavelength. The GRIN lens is based on a specific metamaterial structure that is fully embedded in a polymer background matrix and thus provides a free-standing optics with high transmission and minimal Fresnel reflection. THz lenses with such strong focusing capabilities are especially intriguing with respect to the resolution enhancement of THz imaging systems.