Observation of anomalous shift of x-ray wave packet by deformed crystal set near the Bragg reflection condition and its application to x-ray wave guides

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We experimentally demonstrated an enhanced translation of an x-ray beam nearly parallel to the diffracting planes with mm order distance in a deformed silicon crystal. The combination of a nearby Bragg reflection and a strain field in the crystal allows a shift in the x-ray beam that scales as square of wavelength. For further precise control of x-ray beams, the atomic strain near the interface of hetero-epitaxial crystal was used. By illuminating x-rays onto the interface having thousands of quantum dots on the top, the x-rays were observed to be split into two directions both of which were repeatedly translated under hundreds of quantum dots.