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Proceedings Paper

Moth-eye structures for reduction of Fresnel losses at THz components
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Paper Abstract

The applicability of moth-eye structures to THz components is investigated. With the help of RCWA and effective medium theory, optimal structural parameters for one-dimensional and two-dimensional periodical surface-relief gratings are deduced. The required structural parameters are in such order of magnitude that they can be manufactured by ultra-precision machining directly into the surface of the substrate material. Benefiting is that plastic materials, which are preferred materials in THz spectral region, can be accurately manufactured by ultra-precision machining. The application of the moth-eye structures follows directly the primary shaping of the components by conventional manufacturing methods like turning and milling so that no additional materials are necessary. A comparison between several structures fabricated on planar plastic probes is given.

Paper Details

Date Published: 19 April 2006
PDF: 11 pages
Proc. SPIE 6194, Millimeter-Wave and Terahertz Photonics, 61940N (19 April 2006); doi: 10.1117/12.662199
Show Author Affiliations
Claudia Brückner, Fraunhofer-Institute for Applied Optics and Precision Engineering (Germany)
Boris Pradarutti, Fraunhofer-Institute for Applied Optics and Precision Engineering (Germany)
Stefan Riehemann, Fraunhofer-Institute for Applied Optics and Precision Engineering (Germany)
Olaf Stenzel, Fraunhofer-Institute for Applied Optics and Precision Engineering (Germany)
Ralf Steinkopf, Fraunhofer-Institute for Applied Optics and Precision Engineering (Germany)
Andreas Gebhardt, Fraunhofer-Institute for Applied Optics and Precision Engineering (Germany)
Gunther Notni, Fraunhofer-Institute for Applied Optics and Precision Engineering (Germany)
Andreas Tünnermann, Fraunhofer-Institute for Applied Optics and Precision Engineering (Germany)


Published in SPIE Proceedings Vol. 6194:
Millimeter-Wave and Terahertz Photonics
Dieter Jäger; Andreas Stöhr, Editor(s)

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