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<div class="csl-entry">Popmintchev, D., Imani, A., Carpeggiani, P. A., Roman, J., Wang, S., Yan, J., Song, S., Clairmont, R., Wu, Z., Gangrskaia, E., Kaksis, E., Flöry, T., Pugzlys, A., Baltuska, A., & Popmintchev, T. (2023). <i>Continuously Red-Shift and Blue-Shift Wavelength-Tuneable, Narrowband, High Harmonics in the EUV - X-ray Regime for Resonance Imaging and Spectroscopies</i>. arXiv. https://doi.org/10.48550/arXiv.2307.01182</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/187734
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dc.description.abstract
We demonstrate a novel technique for producing high-order harmonics with designer spectral combs in the extreme ultraviolet–soft X-ray range for resonance applications using spectrally controlled visible lasers. Our approach enables continuous tunability of the harmonic peaks while maintaining superb laser-like features such as coherence, narrow bandwidth, and brightness. The harmonics are conveniently shifted towards lower or higher energies by varying the infrared pulse parameters, second harmonic generation phase-matching conditions, and gas density inside a spectral-broadening waveguide. In the time domain, the X-rays are estimated to emerge as a train of sub-300 attosecond pulses, making this source ideal for studying dynamic processes in ferromagnetic nanostructures and other materials through resonant multidimensional coherent diffractive imaging or other X-ray absorption spectroscopy techniques. Moreover, the visible driving laser beams exhibit an ultrashort sub-10 fs pulse dues to nonlinear self-compression with a more than 30-fold enhancement in peak intensity that also extends the tunability of the linewidth of the harmonic combs.
en
dc.description.sponsorship
Europäischer Forschungsrat (ERC)
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dc.language.iso
en
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dc.subject
EUV - X-ray
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dc.subject
Resonance Imaging
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dc.subject
high-order harmonics
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dc.title
Continuously Red-Shift and Blue-Shift Wavelength-Tuneable, Narrowband, High Harmonics in the EUV - X-ray Regime for Resonance Imaging and Spectroscopies
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dc.type
Preprint
en
dc.type
Preprint
de
dc.identifier.arxiv
2307.01182
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dc.contributor.affiliation
University of California San Diego, USA
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dc.contributor.affiliation
University of California San Diego, USA
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dc.contributor.affiliation
University of California San Diego, USA
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dc.contributor.affiliation
University of California San Diego, USA
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dc.contributor.affiliation
University of California San Diego, USA
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dc.relation.grantno
ERC-2016-STG/ERC-2016-STG
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tuw.project.title
X-ray-waveforms at the Space-Time Resolution Extreme for Atomic-scale Movies XSTREAM