A5090498386- Advanced X-ray Imaging Techniques
- Laser-Plasma Interactions and Diagnostics
- Laser-Matter Interactions and Applications
- Random lasers and scattering media
- Advanced Electron Microscopy Techniques and Applications
- Digital Holography and Microscopy
- Visual perception and processing mechanisms
- Astrophysical Phenomena and Observations
- Atomic and Molecular Physics
- Advanced Fluorescence Microscopy Techniques
- Image and Video Quality Assessment
- X-ray Spectroscopy and Fluorescence Analysis
- Crystallography and Radiation Phenomena
- Laser Design and Applications
- Plant and animal studies
- Particle Accelerators and Free-Electron Lasers
- Laser-induced spectroscopy and plasma
Friedrich Schiller University Jena
2018-2021
Helmholtz Institute Jena
2018-2021
Leibniz Institute of Photonic Technology
2019-2020
Max Planck Institute of Quantum Optics
2019
In this study, the influence of speckle size on contrast-to-noise ratio (CNR) and resolution is examined based object dimensions in macroscopic microscopic regimes. This research shows that for samples conventional scaling laws are no longer effective CNR does not counter-propagate same manner as resolution. To our knowledge, a deviation observed first time field ghost imaging. result was verified using two different sample shapes. addition, numerical analysis revealed noise photodiode...
Abstract Ptychography enables coherent diffractive imaging (CDI) of extended samples by raster scanning across the illuminating XUV/X-ray beam, thereby generalizing unique advantages CDI techniques. Table-top realizations this method are urgently needed for many applications in sciences and industry. Previously, it was only possible to image features much larger than wavelength with table-top ptychography although knife-edge tests suggested sub-wavelength resolution. However, most real-world...
Abstract Understanding the behaviour of matter under conditions extreme temperature, pressure, density and electromagnetic fields has profound effects on our understanding cosmologic objects formation universe. Lacking direct access to such objects, interpretation observed data mainly relies theoretical models. However, models, which need encompass nuclear physics, atomic physics plasma over a huge dynamic range in dimensions energy time, can only provide reliable information if we benchmark...
In this study, we examine the quality of microscale ghost images as a function measured histographic signal distribution speckle fields from nonuniform pseudothermal light source. This research shows that detected level on each pixel camera plays significant role in improving contrast-to-noise ratio (CNR) imaging. To our knowledge, scaling CNR with different intensity distributions is observed for first time field The experimental observations are very good agreement numerical analysis....
Structural analysis of periodic samples with lensless imaging techniques in the extreme ultraviolet spectral range is an important and versatile tool for inspecting nanoscale structures including lithographic masks quasi-crystals. More specifically ptychography method choice such high lateral resolution arbitrarily large field-of-view. This work reports on reconstruction highly that occasionally contain isolated defects. For a realistic scenario scan map distortions, i.e. actual scanning...
We present a coherent imaging setup for extended samples achieving record-high resolution non-periodic samples. A Siemens star pattern is imaged and the Rayleigh criterion used to provide reliable sub-50 nm claim.
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We present a table-top coherent imaging setup at 18 nm that achieves resolution close to one-wavelength in an extended field of view. A Siemens-star pattern is used as ultimate test on non-periodic samples.
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Imaging of biological specimen is one the most important tools to investigate structures and functionalities in organic components. Improving resolution images into nanometer range call for short wavelengths light sources large aperture optics. Subsequently, use extreme ultraviolet 2 nm 5 provides high contrast imaging, if it combined with lensless imaging techniques. We describe parameters samples specify required source properties. To overcome radiation based damage specimen, we discuss...
We evaluated the capabilities of an intense ultrafast high-harmonic seeded soft X-ray laser at 32.8 nm wavelength regarding single-shot lensless imaging and ptychography. Additionally wave front exit plasma amplifier is monitored in amplitude phase using high resolution ptychography backpropagation techniques.Characterizing performance depending on arrival time seed pulse with respect to pump pulses provides insight into light interaction range.
We report the direct wavefront characterization of an intense ultrafast high-harmonic-seeded soft X-ray laser (λ=32.8 nm) depending on arrival time seed pulses by high-resolution ptychographic imaging and subsequently perform single-shot nanoscale imaging.
We report the direct wavefront characterization of an intense ultrafast high-harmonic-seeded soft X-ray laser $(\lambda=32.8 \text{nm})$ and monitor plasma amplifier depending on arrival time seed pulses by high-resolution ptychographic imaging. © 2019 The Author(s)
From fusion dynamics in stars, to terrestrial lightning events, new prospects of energy production or novel light sources, hot dense plasmas are importance for an array physical phenomena. Due a plethora correlations highly excited matter, direct probing isolated remains challenging. Here, the 32.8-nm emission high-harmonic seeded laser-plasma amplifier (LPA), using eight-fold ionized Krypton as gain medium, is ptychographically imaged longitudinal direction extreme ultraviolet (XUV). In...