Holographic imaging with a hard x-ray nanoprobe : Ptychographic versus conventional phase retrieval
(2016) In Optics Letters 41(23). p.5519-5522- Abstract
We have performed near-field x-ray imaging with simultaneous object and probe reconstruction. By an advanced ptychographic algorithm based on longitudinal and lateral translations, full-field images of nanoscale objects are reconstructed with quantitative contrast values, along with the extended wavefronts used to illuminate the objects. The imaging scheme makes idealizing assumptions on the probe obsolete, and efficiently disentangles phase shifts related to the object from the imperfections in the illumination. We validate this approach by comparison to the conventional reconstruction scheme without simultaneous probe retrieval, based on the contrast transfer function algorithm. To this end, a set of semiconductor nanowires with... (More)
We have performed near-field x-ray imaging with simultaneous object and probe reconstruction. By an advanced ptychographic algorithm based on longitudinal and lateral translations, full-field images of nanoscale objects are reconstructed with quantitative contrast values, along with the extended wavefronts used to illuminate the objects. The imaging scheme makes idealizing assumptions on the probe obsolete, and efficiently disentangles phase shifts related to the object from the imperfections in the illumination. We validate this approach by comparison to the conventional reconstruction scheme without simultaneous probe retrieval, based on the contrast transfer function algorithm. To this end, a set of semiconductor nanowires with controlled chemical composition (InP core, insulating SiO2 layer, and indium tin oxide cover) is imaged using the quasi-point source illumination realized by the hard x-ray nanofocus (26 nm x 39 nm spot size) of the ID16A Nano-Imaging beamline at the European Synchrotron Radiation Facility.
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- author
- Robisch, A. L. ; Wallentin, J. LU ; Pacureanu, A. ; Cloetens, P. and Salditt, T.
- organization
- publishing date
- 2016-12-01
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Optics Letters
- volume
- 41
- issue
- 23
- pages
- 4 pages
- publisher
- Optical Society of America
- external identifiers
-
- scopus:85006043767
- wos:000389654000027
- ISSN
- 0146-9592
- DOI
- 10.1364/OL.41.005519
- language
- English
- LU publication?
- yes
- id
- 59c98896-b050-4044-968e-b89275feb09b
- date added to LUP
- 2016-12-30 07:47:21
- date last changed
- 2024-01-19 16:43:37
@article{59c98896-b050-4044-968e-b89275feb09b,
abstract = {{<p>We have performed near-field x-ray imaging with simultaneous object and probe reconstruction. By an advanced ptychographic algorithm based on longitudinal and lateral translations, full-field images of nanoscale objects are reconstructed with quantitative contrast values, along with the extended wavefronts used to illuminate the objects. The imaging scheme makes idealizing assumptions on the probe obsolete, and efficiently disentangles phase shifts related to the object from the imperfections in the illumination. We validate this approach by comparison to the conventional reconstruction scheme without simultaneous probe retrieval, based on the contrast transfer function algorithm. To this end, a set of semiconductor nanowires with controlled chemical composition (InP core, insulating SiO<sub>2</sub> layer, and indium tin oxide cover) is imaged using the quasi-point source illumination realized by the hard x-ray nanofocus (26 nm x 39 nm spot size) of the ID16A Nano-Imaging beamline at the European Synchrotron Radiation Facility.</p>}},
author = {{Robisch, A. L. and Wallentin, J. and Pacureanu, A. and Cloetens, P. and Salditt, T.}},
issn = {{0146-9592}},
language = {{eng}},
month = {{12}},
number = {{23}},
pages = {{5519--5522}},
publisher = {{Optical Society of America}},
series = {{Optics Letters}},
title = {{Holographic imaging with a hard x-ray nanoprobe : Ptychographic versus conventional phase retrieval}},
url = {{http://dx.doi.org/10.1364/OL.41.005519}},
doi = {{10.1364/OL.41.005519}},
volume = {{41}},
year = {{2016}},
}