Abstract

We report a high-resolution and high-efficiency monochromator with energy resolution, $\mathrm{\Delta }E/E\sim 2.08*{10}^{-7}$, utilizing a hard x-ray single-mode Fabry–Perot (FP) resonator at Laue incidence at 14.4388 keV. Instead of using multiple-crystal diffraction via several asymmetric-cut crystals, a 3 meV single-peak is generated from the interference of a Si-made two-plate cavity with a thickness of 70 μm and a gap of 45 μm, where a $(\begin{array}{ccc}0& -4& 0\end{array})$ Laue reflection is used to excite the backreflection (12 4 0) for the enhancement of the FP efficiency. Due to the large angular acceptance of (12 4 0) and $(\begin{array}{ccc}0& -4& 0\end{array})$, the energy tunability can be achieved by changing the incident angle into the resonator. The application of x-ray resonators at Laue incidence as a monochromator can be further implemented to x-ray optics.

© 2017 Optical Society of America

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