Three dimensional variable-wavelength x-ray Bragg coherent diffraction imaging

W. Cha (1) , A. Ulvestad (1) , Marc Allain (2) , Virginie Chamard (2) , R. Harder (3) , S. Leake (4) , J. Maser (3) , P. H. Fuoss (1) , S. O. Hruszkewycz (1)

1 ANL - Argonne National Laboratory [Lemont]
2 COMiX - Coherent Optical Microscopy and X-rays
3 XSD - X-ray Science Division
4 ESRF - European Synchrotron Radiation Facility

We present and demonstrate a formalism by which three dimensional (3D) Bragg x-ray coherent diffraction imaging (BCDI) can be implemented without moving the sample by scanning the energy of the incident x-ray beam. This capability is made possible by introducing a 3D Fourier transform that accounts for x-ray wavelength variability. We demonstrate the approach by inverting coherent Bragg diffraction patterns from a gold nanocrystal measured with an x-ray energy scan. Variable-wavelength BCDI will expand the breadth of feasible in situ 3D strain imaging experiments towards more diverse materials environments, especially where sample manipulation is difficult.

Domaines: Matière Condensée [cond-mat]

W. Cha, A. Ulvestad, Marc Allain, Virginie Chamard, R. Harder, et al.. Three dimensional variable-wavelength x-ray Bragg coherent diffraction imaging. Physical Review Letters, 2016, 117, pp.225501. ⟨10.1103/PhysRevLett.117.225501⟩. ⟨hal-01397101⟩