High-order harmonic generation with resonant core excitation by ultraintense X-rays
High-order harmonic generation (HHG) is combined with resonant X-ray excitation of a core electron into the transient valence vacancy that is created in the course of the HHG process. To describe this setting, I develop a two-active-electron quantum theory for a single atom assuming no Coulomb inter...
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| Main Author: | |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
15 October 2015
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| In: |
The European physical journal. D, Atomic, molecular, optical and plasma physics
Year: 2015, Volume: 69, Issue: 10, Pages: 1-27 |
| ISSN: | 1434-6079 |
| DOI: | 10.1140/epjd/e2015-60357-3 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjd/e2015-60357-3
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| Author Notes: | Christian Buth |
| Summary: | High-order harmonic generation (HHG) is combined with resonant X-ray excitation of a core electron into the transient valence vacancy that is created in the course of the HHG process. To describe this setting, I develop a two-active-electron quantum theory for a single atom assuming no Coulomb interaction among the electrons; one electron performs a typical HHG three-step process whereas another electron is excited (or even Rabi flops) by intense X-rays from the core shell into the valence hole after the first electron has left the atom. Depending on the amplitude to find a vacancy in the valence and the core, the returning continuum electron recombines with the valence and the core, respectively, emitting high-order harmonic (HH) radiation that is characteristic of the combined process. After presenting the theory of X-ray boosted HHG for continuous-wave light fields, I develop a description for X-ray pulses with a time-varying amplitude and phase. My prediction offers novel prospects for nonlinear X-ray physics, attosecond X-rays, and HHG-based time-dependent chemical imaging involving core orbitals. |
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| Item Description: | Gesehen am 30.10.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1434-6079 |
| DOI: | 10.1140/epjd/e2015-60357-3 |