Theoretical analysis and optimization of highly efficient multilayer-coated blazed gratings with high fix-focus constant for the tender X-ray region | Zendy

Qiushi Huang | Zendy; I. V. Kozhevnikov | Zendy; Andréy Sokolov | Zendy; Yeqi Zhuang | Zendy; Tongzhou Li | Zendy; Jiangtao Feng | Zendy; Frank Siewert | Zendy; Jens Viefhaus | Zendy; Zhong Zhang | Zendy; Zhanshan Wang | Zendy

Open Access

Theoretical analysis and optimization of highly efficient multilayer-coated blazed gratings with high fix-focus constant for the tender X-ray region

Author(s) -

Qiushi Huang,

I. V. Kozhevnikov,

Andréy Sokolov,

Yeqi Zhuang,

Tongzhou Li,

Jiangtao Feng,

Frank Siewert,

Jens Viefhaus,

Zhong Zhang,

Zhanshan Wang

Publication year - 2020

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.28.000821

Subject(s) - diffraction efficiency , diffraction , optics , diffraction grating , blazed grating , materials science , grating , focus (optics) , constant (computer programming) , ptychography , x ray , range (aeronautics) , optoelectronics , physics , computer science , composite material , programming language

The problem of X-ray diffraction from multilayer-coated blazed diffraction gratings is analyzed. Invalidity of the conventional condition of maximal diffraction efficiency observed in previous experiments is explained theoretically. This is attributed to two factors: contribution of anti-blaze facets to diffraction efficiency and effect of strongly asymmetric diffraction. We demonstrate that a proper choice of the multilayer d-spacing allows to design grating with the diffraction efficiency close to the maximal possible one throughout the tender X-ray range (E∼1-5 keV). An optimization procedure is suggested for the first time to choose the optimal grating parameters and the operation diffraction order to obtain a high fix-focus constant and high diffraction efficiency simultaneously in a wide spectral range.

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