Diffractive optical reflection elements for the infrared based on artificial dielectrics

Peter Kipfer; Martin Collischon; Helmut Haidner; Johannes Schwider

doi:10.1117/12.188696

17 October 1994 Diffractive optical reflection elements for the infrared based on artificial dielectrics

Peter Kipfer, Martin Collischon, Helmut Haidner, Johannes Schwider

Proceedings Volume 2269, Infrared Technology XX; (1994) https://doi.org/10.1117/12.188696
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

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.

Citation Download Citation

Peter Kipfer, Martin Collischon, Helmut Haidner, and Johannes Schwider "Diffractive optical reflection elements for the infrared based on artificial dielectrics", Proc. SPIE 2269, Infrared Technology XX, (17 October 1994); https://doi.org/10.1117/12.188696

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