Imaging using Bragg and Fresnel diffraction of hard X-rays

Characterizing the hard x-ray diffraction properties of a GaAs linear Bragg–Fresnel lens

We investigated the diffractive focusing properties of ~111! GaAs linear Bragg–Fresnel lenses ~BFLs! developed for hard x-ray microscopy and microdiffraction of complex materials in confined geometries. We demonstrated that the use of GaAs yields significant processing advantages due to the reduced zone depth. Focal plane diffraction patterns of linear BFLs measured at the advanced photon sourc...

Fabrication of Fresnel zone plates for hard X-rays

A method to fabricate gold structures with high aspect ratio is presented. Fresnel zone plates with an outermost zone width of 100 nm and structures of 1 lm height are fabricated. Preliminary focusing results at an X-ray energy of 8 keV are presented and ways to improve the zone plate parameters are discussed. 2007 Elsevier B.V. All rights reserved.

X-ray imaging with off-axis Bragg Fresnel multilayer lenses

We analyse the possibilities of using a new kind of Bragg Fresnel Multilayer Lens that we have designed in order to improve image contrastIl1. We discuss the aberrations and the dynamical properties of this lens on the base of a recently developed dynamical theory[zI and of the data from the first imaging tests that we have performed. The principle of the optimal configuration for utilisation o...

Hard X ray holographic diffraction imaging.

We determine the absolute electron density of a lithographically grown nanostructure with 25 nm resolution by combining hard x-ray Fourier transform holography with iterative phase retrieval methods. While holography immediately reveals an unambiguous image of the object, we deploy in addition iterative phase retrieval algorithms for pushing the resolution close to the diffraction limit. The us...

Diffraction of X-rays