Ten years of x‐ray holography

Faigel, G.; Bortel, Gábor; Fadley, C. S.; Simionovici, Alexandre; Tegze, M.

doi:10.1002/xrs.935

Cited by 19 publications

(10 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The method may be applicable also to x-ray fluorescence patterns from a specific atomic species buried deeply within large molecules 21 ͑e.g., the Fe atom in hemoglobin͒ in solution. Such patterns would be most sensitive to intramolecular scattering, less to that from its surroundings.…”

Section: Discussionmentioning

confidence: 99%

Beyond small-angle x-ray scattering: Exploiting angular correlations

et al. 2010

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 99%

Beyond small-angle x-ray scattering: Exploiting angular correlations

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Its application to experimental data allowed to obtain high-resolution projections of the local structure at different depths. The depth or radial resolution is limited as compared to other methods, 7,33 however this limitation is compensated by the robust character of the realspace approach, which overcomes the inherent problems of x-ray holography associated with long-range order and multiple-scattering effects. 16,29 In addition, the localized character of wavelets makes the method insensitive to missing data.…”

Section: Discussionmentioning

confidence: 99%

“…Such an experimental geometry is similar to that used for x-ray absorption holography. [4][5][6][7][8] Holographic methods employ a monochromatic beam and collect information in reciprocal space. They use Fouriertype reconstruction procedures for converting the measured data to the real space.…”

Section: Introductionmentioning

confidence: 99%

Projections of local atomic structure revealed by wavelet analysis of x-ray absorption anisotropy

2009

View full text Add to dashboard Cite

We propose and verify in an experiment a wavelet transform approach for analysis of x-ray absorption anisotropy ͑XAA͒ patterns recorded using a broadband polychromatic x-ray beam. XAA results from the interference between an incident plane wave with spherical waves scattered from atoms inside the sample. This interference modifies the total x-ray field amplitude at the sites of absorbing atoms and effectively changes the atomic absorption cross section. XAA is monitored by measuring the secondary yield while the sample is rotated relative to the incident-beam direction. For broadband polychromatic hard x-ray illumination, owing to the short coherence length, significant anisotropy in absorption is only found close to directions of the incident radiation coinciding with interatomic directions. In this work, we show that the signals from individual atoms have the same universal shape and differ only in the scale and angular position. Combined with the directional localization this allows us to construct a spherical wavelet family matched to the shape of the observed signal. Application of the wavelet transform to experimental x-ray absorption anisotropy has provided high-resolution projections of the local atomic structure in an InAs crystal up to the sixth coordination shell. While in a recent work XAA delivered a three-dimensional image of the unit cell obtained through a tomographic algorithm, the wavelet approach provides projections of the local structure of absorber atoms with depth resolution and does not depend on the translational long-range order. This opens a way for a quantitative analysis of polychromatic beam x-ray absorption anisotropy for local structure imaging.

show abstract

“…In the future, X-ray holography systems can be of interest for biomedical research. Holographic applications are very challenging and require further development of novel X-ray sources and detectors, as well as innovative holographic system concepts [94,95].…”

Section: D Phase-contrast X-ray Imagingmentioning

confidence: 99%