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Refractive hard x-ray vortex phase plates

DOI: 10.1364/OL.44.004622 DOI Help

Authors: Frank Seiboth (Deutsches Elektronen-Synchrotron DESY; Linac Coherent Light Source) , Maik Kahnt (Deutsches Elektronen-Synchrotron DESY; Universität Hamburg) , Mikhail Lyubomirskiy (Deutsches Elektronen-Synchrotron DESY) , Martin Seyrich (Deutsches Elektronen-Synchrotron DESY; Universität Hamburg) , Felix Wittwer (Deutsches Elektronen-Synchrotron DESY; Universität Hamburg) , Tobias Ullsperger (Friedrich-Schiller-Universität Jena) , Stefan Nolte (Friedrich-Schiller-Universität Jena) , Darren Batey (Diamond Light Source) , Christoph Rau (Diamond Light Source) , Christian G. Schroer (Deutsches Elektronen-Synchrotron DESY; Universität Hamburg)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Optics Letters , VOL 44

State: Published (Approved)
Published: September 2019
Diamond Proposal Number(s): 17460

Abstract: In this Letter, we report on the creation of hard x-ray beams carrying orbital angular momentum of topological charge −ℏ −ℏ and −3ℏ −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.

Subject Areas: Physics, Technique Development


Instruments: I13-1-Coherence