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Photonics 2015, 2(1), 104-123; doi:10.3390/photonics2010104

Quantum Path Interference and Multiple Electron Scattering in Soft X-Ray High-Order Harmonic Generation

1
Institute of Atomic and Subatomic Physics, Vienna University of Technology, Stadionallee 2, 1020 Vienna, Austria
2
Institute of Optics and Quantum Electronics, Abbe Center of Photonics, Friedrich Schiller University, Max Wien Platz 1, 07743 Jena, Germany
3
Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany
4
Institut für Laser- und Plasmaphysik, Universität Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, Germany
5
GSI Helmholtz Centre for Heavy Ion Research, Planckstrasse 1, 64291 Darmstadt, Germany
*
Author to whom correspondence should be addressed.
Received: 10 December 2014 / Accepted: 13 January 2015 / Published: 23 January 2015
(This article belongs to the Special Issue Extreme UV Lasers: Technologies and Applications)
View Full-Text   |   Download PDF [976 KB, uploaded 23 January 2015]   |  

Abstract

High-order harmonic generation is an important mechanism to generate coherent radiation in the few–100-eV spectral range with ultrashort laser pulses. Moreover, a closer inspection of the measured spectra provides unique information about the underlying physics and allows deriving guidelines for improvements. The long-range modulation of the spectral envelope is linked to phase matching, and we will show how to improve it with a double-pulse excitation scheme. Additionally, the spectrum contains only every fourth harmonic, which can be well explained by the quantum interference of multiple scattered electrons, and two dominant electron trajectories were selected by X-ray parametric interaction. View Full-Text
Keywords: high harmonic generation; nonlinear optics; ultrafast optics high harmonic generation; nonlinear optics; ultrafast optics
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Seres, J.; Seres, E.; Landgraf, B.; Aurand, B.; Kuehl, T.; Spielmann, C. Quantum Path Interference and Multiple Electron Scattering in Soft X-Ray High-Order Harmonic Generation. Photonics 2015, 2, 104-123.

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