Open AccessStructure of confined fluids by x-ray interferometry using diffraction gratings
Author(s) -
Kim Nygård,
Dillip K. Satapathy,
Oliver Bunk,
Ana Díaz,
Edith Perret,
Johan Buitenhuis,
Franz Pfeiffer,
Christian Dávid,
J. F. van der Veen
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.020522
Subject(s) - optics , diffraction , interferometry , diffraction grating , diffraction efficiency , grating , interference (communication) , physics , perpendicular , fourier transform , materials science , electromagnetically induced grating , blazed grating , channel (broadcasting) , geometry , mathematics , quantum mechanics , electrical engineering , engineering
We develop a novel method for structure determination of confined fluids using diffraction-grating-based x-ray interferometry.Within this approach, diffraction from a microfluidic array, which acts both as confinement and transmission diffraction grating, provides the reference wave, whereas the density modulations of the confined fluid, acting as a weak phase object, generate the object wave. The ensemble-averaged density profile of the fluid perpendicular to the confining channel is then unambiguously obtained from the interference between the reference and object waves by direct Fourier inversion.