10 citations · 21 across the 7 of their papers we have counts for
9 papers
Energy Time Ptychography for one-dimensional phase retrieval
Ankita Negi, Leon Merten Lohse, Sven Velten +9
Phase retrieval is at the heart of adaptive optics and modern high-resolution imaging. Without phase information, optical systems are limited to intensity-only measurements, hinder…
Interferometric measurement of nuclear resonant phase shift with a nanoscale Young double waveguide
Leon M. Lohse, Ankita Negi, Markus Osterhoff +6
The phase shift of an electromagnetic wave, imprinted by its interaction with atomic scatterers, is a central quantity in optics and photonics. In particular, it encodes informatio…
HoToPy: A toolbox for X-ray holo-tomography in Python
Jens Lucht, Paul Meyer, Leon Merten Lohse +1
We present a Python toolbox for holographic and tomographic X-ray imaging. It comprises a collection of phase retrieval algorithms for the deeply holographic and direct contrast im…
Quantum Nanophotonics with Energetic Particles:X-rays and Free Electrons
Xihang Shi, Wen Wei Lee, Aviv Karnieli +7
Rapid progress in precision nanofabrication and atomic design over the past 50 years has ushered in a succession of transformative eras for molding the generation and flow of light…
TEMPUS, a Timepix4-based system for event-based X-rays detection
Jonathan Correa, Alexandr Ignatenko, David Pennicard +16
A readout system based on the Timepix4 ASIC, is being developed for photon science. The TEMPUS detector can be operated in two distinct modes: a photon counting mode, which allows…
Collective nuclear excitation and pulse propagation in single-mode x-ray waveguides
Leon M. Lohse, Petar Andrejić, Sven Velten +8
Waveguides offer a means to controllably couple atomic ensembles to the electromagnetic field therein. Here, we demonstrate x-ray propagation in planar thin-film waveguides coupled…
Phase retrieval beyond the homogeneous object assumption for X-ray in-line holographic imaging
Jens Lucht, Leon M. Lohse, Thorsten Hohage +1
X-ray near field holography has proven to be a powerful 2D and 3D imaging technique with applications ranging from biomedical research to material sciences. To reconstruct meaningf…
Waveguide QED with Moessbauer Nuclei
Petar Andrejic, Leon Merten Lohse, Adriana Palffy
Thin-film nanostructures with embedded Mössbauer nuclei have been successfully used for x-ray quantum optical applications with hard x-rays coupling in grazing incidence. Here we a…
Fast algorithms for nonlinear and constrained phase retrieval in near-field X-ray holography based on Tikhonov regularization
Simon Huhn, Leon Merten Lohse, Jens Lucht +1
Based on phase retrieval, lensless coherent imaging and in particular holography offers quantitative phase and amplitude images. This is of particular importance for spectral range…