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Proceedings Paper

Diffractive optical reflection elements for the infrared based on artificial dielectrics
Author(s): Peter Kipfer; Martin Collischon; Helmut Haidner; Johannes Schwider
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Paper Abstract

A novel design for imitating continuous phase profiles by binary sub-wavelength structures is presented. The continuous phase profiles, in general blaze structures, are required to achieve high diffraction efficiencies. The working principle has recently been shown for regular gratings like beam deflectors or polarizing beamsplitters. The subject of this paper is to transfer this principle to non strictly periodic gratings like lenses and further to avoid the strong polarization dependence by using 2-dimensional modulated sub-wavelength structures. A further event of this paper is to examine the origin of this effect. Two possibilities are at one's disposal, firstly the resonance effect because the structure size is nearly as big as the wavelength, and secondly the averaging effect which should be responsible if the light cannot resolve the small structures.

Paper Details

Date Published: 17 October 1994
PDF: 9 pages
Proc. SPIE 2269, Infrared Technology XX, (17 October 1994); doi: 10.1117/12.188696
Show Author Affiliations
Peter Kipfer, Univ. Erlangen-Nuernberg (Germany)
Martin Collischon, Univ. Erlangen-Nuernberg (Germany)
Helmut Haidner, Univ. Erlangen-Nuernberg (Germany)
Johannes Schwider, Univ. Erlangen-Nuernberg (Germany)


Published in SPIE Proceedings Vol. 2269:
Infrared Technology XX
Bjorn F. Andresen, Editor(s)

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