A5034380521- Advanced X-ray Imaging Techniques
- Electron and X-Ray Spectroscopy Techniques
- Advanced Electron Microscopy Techniques and Applications
- Medical Imaging Techniques and Applications
- Pediatric Urology and Nephrology Studies
- Advanced Materials Characterization Techniques
- Machine Learning in Materials Science
- MRI in cancer diagnosis
- Advanced X-ray and CT Imaging
- Nuclear Physics and Applications
- Laser-Matter Interactions and Applications
- X-ray Diffraction in Crystallography
- Spectroscopy and Quantum Chemical Studies
- Geological and Geochemical Analysis
- Ion-surface interactions and analysis
- Advanced Chemical Physics Studies
- Hydrocarbon exploration and reservoir analysis
- Biomedical and Engineering Education
- Surface and Thin Film Phenomena
- Particle physics theoretical and experimental studies
- Graphene research and applications
- 2D Materials and Applications
- Crystallography and Radiation Phenomena
- Pelvic and Acetabular Injuries
- Particle Accelerators and Free-Electron Lasers
Humboldt-Universität zu Berlin
2019-2024
Humboldt State University
2021
Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy
2017-2018
Abstract Science is and always has been based on data, but the terms ‘data-centric’ ‘4th paradigm’ of materials research indicate a radical change in how information retrieved, handled performed. It signifies transformative shift towards managing vast data collections, digital repositories, innovative analytics methods. The integration artificial intelligence its subset machine learning, become pivotal addressing all these challenges. This Roadmap Data-Centric Materials explores fundamental...
Abstract We present a method that lowers the dose required for an electron ptychographic reconstruction by adaptively scanning specimen, thereby providing spatial information redundancy in regions of highest importance. The proposed is built upon deep learning model trained reinforcement learning, using prior knowledge specimen structure from training data sets. show adaptive ptychography outperforms alternative low-dose experiments terms resolution and quality.
We develop theoretically and confirm both numerically experimentally a comprehensive analytical model which describes the propensity rules in emission of circularly polarized high harmonics by systems driven two-color counter-rotating fields, fundamental its second harmonic. identify three responsible for contrast between $3N+1$ $3N+2$ harmonic lines HHG spectra noble gas atoms. demonstrate how these depend on laser parameters they can be used experiment to shape polarization properties...
The overdetermination of the mathematical problem underlying ptychography is reduced by a host experimentally more desirable settings. Furthermore, reconstruction sample-induced phase shift typically limited uncertainty in experimental parameters and finite sample thicknesses. Presented conjugate gradient descent algorithm, regularized optimization for (ROP), that recovers partially known along with shift, improves resolution incorporating multislice formalism to treat thicknesses, includes...
The bi-circular scheme for high harmonic generation, which combines two counter-rotating circular fields with frequency ratio 2:1, has recently permitted to generate harmonics essentially polarization, opening the way ultrafast chiral studies. This produces lines at 3N + 1 and 2 multiples of fundamental driving frequency, while are forbidden owing three-fold symmetry field. It is generally established that routinely observed signals these come from a slight ellipticity in fields, breaks...
4D scanning transmission electron microscopy (4D‐STEM) is a powerful method for characterizing electron‐transparent samples with down to sub‐Ångstrom spatial resolution. 4D‐STEM can reveal local crystallinity, orientation, grain size, strain, and many more sample properties by rastering convergent beam over area acquiring diffraction pattern (DP) at each scan position. These patterns are rich in information about the atomic structure of probed volume, making this technique potent tool...
Science is and always has been based on data, but the terms ‘data-centric’ ‘4th paradigm’ of materials research indicate a radical change in how information retrieved, handled performed. It signifies transformative shift towards managing vast data collections, digital repositories, innovative analytics methods. The integration Artificial Intelligence (AI) its subset Machine Learning (ML), become pivotal addressing all these challenges. This Roadmap Data-Centric Materials explores fundamental...
Abstract Increasing interest in three-dimensional nanostructures adds impetus to electron microscopy techniques capable of imaging at or below the nanoscale three dimensions. We present a reconstruction algorithm that takes as input focal series four-dimensional scanning transmission (4D-STEM) data. apply approach lead iridate, PbIrO, and yttrium-stabilized zirconia, YZrO, heterostructure from data acquired with specimen single plan-view orientation, epitaxial layers stacked along beam...
Science is and always has been based on data, but the terms ‘data-centric’ ‘4th paradigm’ of materials research indicate a radical change in how information retrieved, handled performed. It signifies transformative shift towards managing vast data collections, digital repositories, innovative analytics methods. The integration Artificial Intelligence (AI) its subset Machine Learning (ML), become pivotal addressing all these challenges. This Roadmap Data-Centric Materials explores fundamental...
Science is and always has been based on data, but the terms ‘data-centric’ ‘4th paradigm’ of materials research indicate a radical change in how information retrieved, handled performed. It signifies transformative shift towards managing vast data collections, digital repositories, innovative analytics methods. The integration Artificial Intelligence (AI) its subset Machine Learning (ML), become pivotal addressing all these challenges. This Roadmap Data-Centric Materials explores fundamental...
A detailed analysis of ptychography for three-dimensional (3D) phase reconstructions thick specimens is performed. We introduce multi-focus ptychography, which incorporates a 4D-STEM defocus series to enhance the quality 3D along beam direction through higher overdetermination ratio. This method compared with established multi-slice techniques, such as conventional regularized and multi-mode ptychography. Additionally, we contrast an alternative that uses virtual optical sectioning...
Journal Article Comparison of Compression Methods for Ptychographic Reconstructions through Decomposition the Diffraction Patterns in Orthonormal Bases Get access Anton Gladyshev, Gladyshev Humboldt-Universität zu Berlin, Institut für Physik & IRIS Adlershof, Germany Search other works by this author on: Oxford Academic Google Scholar Marcel Schloz, Schloz Thomas C Pekin, Pekin Christoph T Koch Corresponding author: christoph.koch@hu-berlin.de Microscopy and Microanalysis, Volume 28, Issue...
Journal Article Towards Ptychography with Structured Illumination, and a Derivative-Based Reconstruction Algorithm Get access W Van den Broek, Broek Institut für Physik & IRIS Adlershof, Humboldt-Universität zu Berlin, Germany Corresponding author: vandenbroek@physik.hu-berlin.de Search for other works by this author on: Oxford Academic Google Scholar M Schloz, Schloz TC Pekin, Pekin PM Pelz, Pelz Max Planck Institute the Structure Dynamics of Matter, Center Free Electron Laser Science,...
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A detailed analysis of ptychography for 3D phase reconstructions thick specimens is performed. We introduce multi-focus ptychography, which incorporates a 4D-STEM defocus series to enhance the quality along beam direction through higher overdetermination ratio. This method compared with established multi-slice techniques, such as conventional regularized and multi-mode ptychography. Additionally, we contrast an alternative that uses virtual optical sectioning reconstructed scattering matrix...
Science is and always has been based on data, but the terms "data-centric" "4th paradigm of" materials research indicate a radical change in how information retrieved, handled performed. It signifies transformative shift towards managing vast data collections, digital repositories, innovative analytics methods. The integration of Artificial Intelligence (AI) its subset Machine Learning (ML), become pivotal addressing all these challenges. This Roadmap Data-Centric Materials explores...
An abstract is not available for this content so a preview has been provided. As you have access to content, full PDF via the 'Save PDF' action button.
Journal Article High Resolution Three-Dimensional Reconstructions in Electron Microscopy Through Multifocus Ptychography Get access Marcel Schloz, Schloz Humboldt Universität zu Berlin, Institut für Physik & IRIS Adlershof, Germany Corresponding author: schlozma@hu-berlin.de Search for other works by this author on: Oxford Academic Google Scholar Thomas C Pekin, Pekin Hamish G Brown, Brown National Center Microscopy, Molecular Foundry, Lawrence Berkeley Laboratory, Berkeley, California...
Journal Article ab initio Electrostatic Potentials for 4D-STEM Ptychographic Reconstruction Get access Jacob Madsen, Madsen University of Vienna, Faculty Physics, Austria Search other works by this author on: Oxford Academic Google Scholar Christoph Hofer, Hofer Electron Microscopy Materials Science (EMAT), Antwerp, Belgium Thomas C Pekin, Pekin Humboldt-Universität zu Berlin, Institut für Physik & IRIS, Adlershof, Germany Marcel Schloz, Schloz Thuy An Bui, Bui Koch, Koch Timothy J...
An abstract is not available for this content so a preview has been provided. As you have access to content, full PDF via the ‘Save PDF’ action button.
Increasing interest in three-dimensional nanostructures adds impetus to electron microscopy techniques capable of imaging at or below the nanoscale three dimensions. We present a reconstruction algorithm that takes as input focal series four-dimensional scanning transmission (4D-STEM) data. apply approach lead iridate, Pb$_2$Ir$_2$O$_7$, and yttrium-stabilized zirconia,Y$_{0.095}$Zr$_{0.905}$O$_2$ , heterostructure from data acquired with specimen single plan-view orientation, epitaxial...
The overdetermination of the mathematical problem underlying ptychography is reduced by a host experimentally more desirable settings. Furthermore, reconstruction sample-induced phase shift typically limited uncertainty in experimental parameters and finite sample thicknesses. Presented conjugate gradient descent algorithm, regularized optimization for (ROP), that recovers partially known along with shift, improves resolution incorporating multislice formalism to treat thicknesses, includes...