Resolution improvement in coherent diffractive imaging (ptychography)

2010 ◽  
Author(s):  
T. B. Edo ◽  
F. Zhang ◽  
J. M. Rodenburg
Keyword(s):  
Diffractive Imaging ◽  
Coherent Diffractive Imaging ◽  
Resolution Improvement

scholarly journals 3D Bragg coherent diffractive imaging of five-fold multiply twinned gold nanoparticle

Nanoscale ◽  
2017 ◽  
Vol 9 (35) ◽  
pp. 13153-13158 ◽  
Author(s):  
Jong Woo Kim ◽  
Andrew Ulvestad ◽  
Sohini Manna ◽  
Ross Harder ◽  
Eric E. Fullerton ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Formation Mechanism ◽  
Diffractive Imaging ◽  
Coherent Diffractive Imaging

The formation mechanism of five-fold multiply twinned nanoparticles has been a long-term topic because of their geometrical incompatibility.

Advances in ptychographical coherent diffractive imaging

2008 ◽  
Author(s):  
Andreas Menzel ◽  
Pierre Thibault ◽  
Martin Dierolf ◽  
Cameron M. Kewish ◽  
Oliver Bunk ◽  
...  
Keyword(s):  
Diffractive Imaging ◽  
Coherent Diffractive Imaging

scholarly journals Dynamic diffraction artefacts in Bragg coherent diffractive imaging

2018 ◽  
Vol 51 (1) ◽  
pp. 167-174 ◽  
Author(s):  
Wen Hu ◽  
Xiaojing Huang ◽  
Hanfei Yan
Keyword(s):  
Theoretical Study ◽  
Diffraction Limit ◽  
Complex Object ◽  
Diffractive Imaging ◽  
Dynamical Diffraction ◽  
Coherent Diffractive Imaging ◽  
Dynamic Diffraction ◽  
Diffraction Effects

This article reports a theoretical study on the reconstruction artefacts in Bragg coherent diffractive imaging caused by dynamical diffraction effects. It is shown that, unlike the absorption and refraction effects that can be corrected after reconstruction, dynamical diffraction effects have profound impacts on both the amplitude and the phase of the reconstructed complex object, causing strong artefacts. At the dynamical diffraction limit, the reconstructed shape is no longer correct, as a result of the strong extinction effect. Simulations for hemispherical particles of different sizes show the type, magnitude and extent of the dynamical diffraction artefacts, as well as the conditions under which they are negligible.

Mapping granular structure in the biological adhesive of Phragmatopoma californica using phase diverse coherent diffractive imaging

2011 ◽  
Vol 111 (8) ◽  
pp. 1184-1188 ◽  
Author(s):  
Corey T. Putkunz ◽  
Jesse N. Clark ◽  
David J. Vine ◽  
Garth J. Williams ◽  
Eugeniu Balaur ◽  
...  
Keyword(s):  
Granular Structure ◽  
Diffractive Imaging ◽  
Coherent Diffractive Imaging ◽  
Phragmatopoma Californica ◽  
Biological Adhesive

scholarly journals Hard X-ray polarizer to enable simultaneous three-dimensional nanoscale imaging of magnetic structure and lattice strain

2016 ◽  
Vol 23 (5) ◽  
pp. 1210-1215 ◽  
Author(s):  
Jonathan Logan ◽  
Ross Harder ◽  
Luxi Li ◽  
Daniel Haskel ◽  
Pice Chen ◽  
...  
Keyword(s):  
Magnetic Circular Dichroism ◽  
Three Dimensional ◽  
Control Sample ◽  
Magnetic Ordering ◽  
X Rays ◽  
Diffractive Imaging ◽  
X Ray ◽  
Coherent Diffractive Imaging ◽  
Diffraction Patterns ◽  
A New Technique

Recent progress in the development of dichroic Bragg coherent diffractive imaging, a new technique for simultaneous three-dimensional imaging of strain and magnetization at the nanoscale, is reported. This progress includes the installation of a diamond X-ray phase retarder at beamline 34-ID-C of the Advanced Photon Source. The performance of the phase retarder for tuning X-ray polarization is demonstrated with temperature-dependent X-ray magnetic circular dichroism measurements on a gadolinium foil in transmission and on a Gd5Si2Ge2crystal in diffraction geometry with a partially coherent, focused X-ray beam. Feasibility tests for dichroic Bragg coherent diffractive imaging are presented. These tests include (1) using conventional Bragg coherent diffractive imaging to determine whether the phase retarder introduces aberrations using a nonmagnetic gold nanocrystal as a control sample, and (2) collecting coherent diffraction patterns of a magnetic Gd5Si2Ge2nanocrystal with left- and right-circularly polarized X-rays. Future applications of dichroic Bragg coherent diffractive imaging for the correlation of strain and lattice defects with magnetic ordering and inhomogeneities are considered.

scholarly journals Dynamic coherent diffractive imaging with aphysics-driven untrained learning method

2021 ◽  
Author(s):  
Dongyu Yang ◽  
Junhao Zhang ◽  
Ye Tao ◽  
Wenjin Lv ◽  
Xinkai Sun ◽  
...  
Keyword(s):  
Learning Method ◽  
Diffractive Imaging ◽  
Coherent Diffractive Imaging
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