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Refractive hard x-ray vortex phase plates

Seiboth, Frank ; Kahnt, Maik LU ; Lyubomirskiy, Mikhail ; Seyrich, Martin ; Wittwer, Felix ; Ullsperger, Tobias ; Nolte, Stefan ; Batey, Darren ; Rau, Christoph and Schroer, Christian G. (2019) In Optics Letters 44(18). p.4622-4625
Abstract

In this Letter, we report on the creation of hard x-ray beams carrying orbital angular momentum of topological charge −ℏ and −3ℏ at a photon energy of 8.2 keV via spiral phase plates made out of fused silica by ultrashort-pulsed laser ablation. The phase plates feature a smooth phase ramp with a 0.5 μm nominal step height and a surface roughness of 0.5 μm. The measured vortex beams show submicrometer-sized donut rings and agree well with numerical modeling. Fused silica phase plates are potentially suited to manipulate the electromagnetic field in highly intense x-ray beams at x-ray free-electron laser sources.

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author
publishing date
type
Contribution to journal
publication status
published
in
Optics Letters
volume
44
issue
18
pages
4 pages
publisher
Optical Society of America
external identifiers
  • scopus:85072120300
  • pmid:31517948
ISSN
0146-9592
DOI
10.1364/OL.44.004622
language
English
LU publication?
no
id
a96178d5-3ba9-4809-803f-d06b0194b85e
date added to LUP
2019-10-12 12:49:44
date last changed
2020-01-13 02:27:39
@article{a96178d5-3ba9-4809-803f-d06b0194b85e,
  abstract     = {<p>In this Letter, we report on the creation of hard x-ray beams carrying orbital angular momentum of topological charge −ℏ and −3ℏ at a photon energy of 8.2 keV via spiral phase plates made out of fused silica by ultrashort-pulsed laser ablation. The phase plates feature a smooth phase ramp with a 0.5 μm nominal step height and a surface roughness of 0.5 μm. The measured vortex beams show submicrometer-sized donut rings and agree well with numerical modeling. Fused silica phase plates are potentially suited to manipulate the electromagnetic field in highly intense x-ray beams at x-ray free-electron laser sources.</p>},
  author       = {Seiboth, Frank and Kahnt, Maik and Lyubomirskiy, Mikhail and Seyrich, Martin and Wittwer, Felix and Ullsperger, Tobias and Nolte, Stefan and Batey, Darren and Rau, Christoph and Schroer, Christian G.},
  issn         = {0146-9592},
  language     = {eng},
  month        = {09},
  number       = {18},
  pages        = {4622--4625},
  publisher    = {Optical Society of America},
  series       = {Optics Letters},
  title        = {Refractive hard x-ray vortex phase plates},
  url          = {http://dx.doi.org/10.1364/OL.44.004622},
  doi          = {10.1364/OL.44.004622},
  volume       = {44},
  year         = {2019},
}