Explore the words cloud of the XSTREAM project. It provides you a very rough idea of what is the project "XSTREAM" about.
The following table provides information about the project.
TECHNISCHE UNIVERSITAET WIEN
|Coordinator Country||Austria [AT]|
|Total cost||1˙513˙335 €|
|EC max contribution||1˙513˙335 € (100%)|
1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
|Duration (year-month-day)||from 2017-08-01 to 2022-07-31|
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|1||TECHNISCHE UNIVERSITAET WIEN||AT (WIEN)||coordinator||1˙513˙335.00|
Nonlinear optics revolutionized the ability to create directed, coherent beams particularly in spectral regions where lasers based on conventional population inversion are not practical. New breakthroughs in extreme nonlinear optics promise a similar revolution in the X-ray regime. In a dramatic and unanticipated breakthrough, an international team lead by the PI demonstrated that the high harmonic generation process (HHG) driven by mid-IR lasers can be used to generate keV photons, implementing a >5000 order nonlinear process, while still maintaining the full phase matching that is necessary for good conversion efficiency. This work represents the most extreme, fully coherent upconversion for electromagnetic waves in the 50 year history of nonlinear optics. Moreover, the limits of HHG are still not understood, either theoretically or experimentally. It may be possible to generate coherent hard X-rays using a tabletop-scale apparatus.
In another surprising breakthrough, the PI showed that UV-driven HHG in multiply ionized plasma can be also highly efficient, representing a 2nd route towards the X-ray region. Remarkably, this regime provides X-rays with contrasting spectral and temporal properties. Furthermore, by shaping the polarization of a bi-color mid-IR driving laser the PI, the JILA team in collaboration with Technion, demonstrated robust phase matching of circularly polarized soft X-rays.
In the proposed work, the fundamental atomic, phase matching plus group velocity matching limits of HHG in the multi-keV X-ray regime will be explored using the 3 most promising, complimentary approaches: 1) mid-IR driven HHG, 2) UV driven HHG, and 3) all-optical quasi phase matching. The knowledge gained as a result of this effort will identify the best path forward for generating bright coherent X-ray beams on a tabletop, at photon energies of 1-10 keV and greater with unprecedented attosecond-to-zeptosecond pulse durations, and arbitrary polarization state.
|year||authors and title||journal||last update|
Xiaohui Gao, Gauri Patwardhan, Bonggu Shim, Tenio Popmintchev, Henry C. Kapteyn, Margaret M. Murnane, Alexander L. Gaeta
Ionization-assisted spatiotemporal localization in gas-filled capillaries
published pages: 3112, ISSN: 0146-9592, DOI: 10.1364/ol.43.003112
|Optics Letters 43/13||2019-11-28|
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