On the basis of rigorous dynamical-theory calculations, a complete X-ray polarization-switch effect of silicon crystals at the exact multiple-beam diffraction condition is demonstrated. The underlying physical mechanism of this unique phenomenon can be revealed using a simple multiple-wave propagation and interference model. The constructive and destructive interference of the multiple detoured-diffraction beams along the direction of the primary diffracted beam directly leads to the complete polarization switch. This phenomenon can be realized using both synchrotron and laboratory X-ray sources at many discrete wavelengths, and used to design a novel crystal-based polarizer to achieve a 90° polarization rotation.

中文翻译：

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多光束衍射几何条件下硅晶体的偏振转换效应

在严格的动力学理论计算的基础上，证明了在精确的多光束衍射条件下硅晶体的完整 X 射线偏振切换效应。可以使用简单的多波传播和干扰模型揭示这种独特现象的潜在物理机制。沿主衍射光束方向的多束绕行衍射光束的相长干涉和相消干涉直接导致完整的偏振切换。这种现象可以使用同步加速器和实验室 X 射线源在许多离散波长下实现，并用于设计一种新颖的基于晶体的偏振器以实现 90° 偏振旋转。