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

Claudia Brückner; Boris Pradarutti; Stefan Riehemann; Olaf Stenzel; Ralf Steinkopf; Andreas Gebhardt; Gunther Notni; Andreas Tünnermann

doi:10.1117/12.662199

19 April 2006 Moth-eye structures for reduction of Fresnel losses at THz components

Claudia Brückner, Boris Pradarutti, Stefan Riehemann, Olaf Stenzel, Ralf Steinkopf, Andreas Gebhardt, Gunther Notni, Andreas Tünnermann

Author Affiliations +

Proceedings Volume 6194, Millimeter-Wave and Terahertz Photonics; 61940N (2006) https://doi.org/10.1117/12.662199
Event: SPIE Photonics Europe, 2006, Strasbourg, France

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.

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Claudia Brückner, Boris Pradarutti, Stefan Riehemann, Olaf Stenzel, Ralf Steinkopf, Andreas Gebhardt, Gunther Notni, and Andreas Tünnermann "Moth-eye structures for reduction of Fresnel losses at THz components", Proc. SPIE 6194, Millimeter-Wave and Terahertz Photonics, 61940N (19 April 2006); https://doi.org/10.1117/12.662199

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