Singleshot polychromatic coherent diffractive imaging with a high-order harmonic source

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Abstract

Singleshot polychromatic coherent diffractive imaging is performed with a high-intensity high-order harmonic generation source. The coherence properties are analyzed and several reconstructions show the shot-to-shot fluctuations of the incident beam wavefront. The method is based on a multi-step approach. First, the spectrum is extracted from double-slit diffraction data. The spectrum is used as input to extract the monochromatic sample diffraction pattern, then phase retrieval is performed on the quasi-monochromatic data to obtain the sample's exit surface wave. Reconstructions based on guided error reduction (ER) and alternating direction method of multipliers (ADMM) are compared. ADMM allows additional penalty terms to be included in the cost functional to promote sparsity within the reconstruction.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Atom- och molekylfysik och optik
Originalspråkengelska
Sidor (från-till)394-404
Antal sidor11
TidskriftOptics Express
Volym28
Utgåva nummer1
StatusPublished - 2020 jan 6
PublikationskategoriForskning
Peer review utfördJa