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Special Issue on “Metasurfaces: Physics and Applications”
Open AccessFeature PaperArticle

Hard X-ray Generation from ZnO Nanowire Targets in a Non-Relativistic Regime of Laser-Solid Interactions

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Institute of Optics and Quantum Electronics, Friedrich Schiller University, Jena, Max Wien Platz 1, 07743 Jena, Germany
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Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany
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Abbe Center of Photonics, Friedrich Schiller University, Jena, Albert Einstein Straße 6, 07745 Jena, Germany
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Institute of Solid State Physics, Friedrich Schiller University, Jena, Helmholtzweg 3, 07743 Jena, Germany
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GSI Helmholtz Centre for Heavy Ion Research, Planckstraße 1, 64220 Darmstadt, Germany
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Goethe University, Institute of Applied Physics, Max von Laue Straße 1, 60438 Frankfurt am Main, Germany
*
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(10), 1728; https://doi.org/10.3390/app8101728
Received: 29 August 2018 / Revised: 16 September 2018 / Accepted: 21 September 2018 / Published: 25 September 2018
(This article belongs to the Special Issue Diagnostic Techniques for Laser-plasma Experiments)
We present a detailed investigation of X-ray emission from both flat and nanowire zinc oxide targets irradiated by 60 fs 5 × 1016 W/cm2 intensity laser pulses at a 0.8 µm wavelength. It is shown that the fluence of the emitted hard X-ray radiation in the spectral range 150–800 keV is enhanced by at least one order of magnitude for nanowire targets compared to the emission from a flat surface, whereas the characteristic Kα line emission (8.64 keV) is insensitive to the target morphology. Furthermore, we provide evidence for a dramatic increase of the fast electron flux from the front side of the nanostructured targets. We suggest that targets with nanowire morphology may advance development of compact ultrafast X-ray sources with an enhanced flux of hard X-ray emission that could find wide applications in highenergy density (HED) physics. View Full-Text
Keywords: X-ray generation; laser-matter interaction; ultrashort laser pulses; X-ray spectroscopy; laser plasma emission; nanostructured arrays X-ray generation; laser-matter interaction; ultrashort laser pulses; X-ray spectroscopy; laser plasma emission; nanostructured arrays
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MDPI and ACS Style

Samsonova, Z.; Höfer, S.; Hollinger, R.; Kämpfer, T.; Uschmann, I.; Röder, R.; Trefflich, L.; Rosmej, O.; Förster, E.; Ronning, C.; Kartashov, D.; Spielmann, C. Hard X-ray Generation from ZnO Nanowire Targets in a Non-Relativistic Regime of Laser-Solid Interactions. Appl. Sci. 2018, 8, 1728.

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