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Refractive hard x-ray vortex phase plates

Seiboth, Frank ; Kahnt, Maik LU orcid ; 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
; ; ; ; ; ; ; ; and
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
  • pmid:31517948
  • scopus:85072120300
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
2022-10-01 20:43:22
@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}},
}