Investigation of the properties of Bragg-Fresnel gratings

Alexei I. Erko; Alexandre Firsov

doi:10.1117/12.560915

4 November 2004 Investigation of the properties of Bragg-Fresnel gratings

Alexei I. Erko, Alexandre Firsov

Proceedings Volume 5539, Design and Microfabrication of Novel X-Ray Optics II; (2004) https://doi.org/10.1117/12.560915
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

Systematic experimental investigations of Bragg-Fresnel gratings are discussed. Gold and nickel masks with periods of 0.4 μm n 5 μm were evaporated on the surfaces of Si [111] symmetric and asymmetric crystals. These have been used to obtain x-ray diffraction in the energy range of 8000 eV n 8500 eV. A theoretically calculated maximum of diffraction efficiency of the order of 30 % was measured experimentally for gratings with grooves parallel to the beam direction (sagittal gratings). Diffraction effects in the crystalline substrate for the gratings with grooves perpendicular to the beam direction (meridional gratings) limit the diffraction efficiency on the order of a few percent. Experimental data are compared with the theoretical calculations dispersion and efficiency of Bragg-Fresnel gratings.

Citation Download Citation

Alexei I. Erko and Alexandre Firsov "Investigation of the properties of Bragg-Fresnel gratings", Proc. SPIE 5539, Design and Microfabrication of Novel X-Ray Optics II, (4 November 2004); https://doi.org/10.1117/12.560915

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