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Reconstruction of the near-field distribution in an X-ray waveguide array
Iterative phase retrieval has been used to reconstruct the near-field distribution behind tailored X-ray waveguide arrays, by inversion of the measured far-field pattern recorded under fully coherent conditions. It is thereby shown that multi-waveguide interference can be exploited to control the ne...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
International Union of Crystallography
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5458589/ https://www.ncbi.nlm.nih.gov/pubmed/28656035 http://dx.doi.org/10.1107/S1600576717004630 |
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author | Zhong, Qi Melchior, Lars Peng, Jichang Huang, Qiushi Wang, Zhanshan Salditt, Tim |
author_facet | Zhong, Qi Melchior, Lars Peng, Jichang Huang, Qiushi Wang, Zhanshan Salditt, Tim |
author_sort | Zhong, Qi |
collection | PubMed |
description | Iterative phase retrieval has been used to reconstruct the near-field distribution behind tailored X-ray waveguide arrays, by inversion of the measured far-field pattern recorded under fully coherent conditions. It is thereby shown that multi-waveguide interference can be exploited to control the near-field distribution behind the waveguide exit. This can, for example, serve to create a secondary quasi-focal spot outside the waveguide structure. For this proof of concept, an array of seven planar Ni/C waveguides are used, with precisely varied guiding layer thickness and cladding layer thickness, as fabricated by high-precision magnetron sputtering systems. The controlled thickness variations in the range of 0.2 nm results in a desired phase shift of the different waveguide beams. Two kinds of samples, a one-dimensional waveguide array and periodic waveguide multilayers, were fabricated, each consisting of seven C layers as guiding layers and eight Ni layers as cladding layers. These are shown to yield distinctly different near-field patterns. |
format | Online Article Text |
id | pubmed-5458589 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | International Union of Crystallography |
record_format | MEDLINE/PubMed |
spelling | pubmed-54585892017-06-27 Reconstruction of the near-field distribution in an X-ray waveguide array Zhong, Qi Melchior, Lars Peng, Jichang Huang, Qiushi Wang, Zhanshan Salditt, Tim J Appl Crystallogr Research Papers Iterative phase retrieval has been used to reconstruct the near-field distribution behind tailored X-ray waveguide arrays, by inversion of the measured far-field pattern recorded under fully coherent conditions. It is thereby shown that multi-waveguide interference can be exploited to control the near-field distribution behind the waveguide exit. This can, for example, serve to create a secondary quasi-focal spot outside the waveguide structure. For this proof of concept, an array of seven planar Ni/C waveguides are used, with precisely varied guiding layer thickness and cladding layer thickness, as fabricated by high-precision magnetron sputtering systems. The controlled thickness variations in the range of 0.2 nm results in a desired phase shift of the different waveguide beams. Two kinds of samples, a one-dimensional waveguide array and periodic waveguide multilayers, were fabricated, each consisting of seven C layers as guiding layers and eight Ni layers as cladding layers. These are shown to yield distinctly different near-field patterns. International Union of Crystallography 2017-05-16 /pmc/articles/PMC5458589/ /pubmed/28656035 http://dx.doi.org/10.1107/S1600576717004630 Text en © Qi Zhong et al. 2017 http://creativecommons.org/licenses/by/2.0/uk/ This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.http://creativecommons.org/licenses/by/2.0/uk/ |
spellingShingle | Research Papers Zhong, Qi Melchior, Lars Peng, Jichang Huang, Qiushi Wang, Zhanshan Salditt, Tim Reconstruction of the near-field distribution in an X-ray waveguide array |
title | Reconstruction of the near-field distribution in an X-ray waveguide array
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title_full | Reconstruction of the near-field distribution in an X-ray waveguide array
|
title_fullStr | Reconstruction of the near-field distribution in an X-ray waveguide array
|
title_full_unstemmed | Reconstruction of the near-field distribution in an X-ray waveguide array
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title_short | Reconstruction of the near-field distribution in an X-ray waveguide array
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title_sort | reconstruction of the near-field distribution in an x-ray waveguide array |
topic | Research Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5458589/ https://www.ncbi.nlm.nih.gov/pubmed/28656035 http://dx.doi.org/10.1107/S1600576717004630 |
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