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Disentangling Long Trajectory Contributions in Two-Colour High Harmonic Generation

1
Max Planck Insitute for the Physics of Complex Systems, Nöthnitzer Straße 38, D-01187 Dresden, Germany
2
Department of Physics, ETH Zurich, 8093 Zurich, Switzerland
*
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(3), 341; https://doi.org/10.3390/app8030341
Received: 18 January 2018 / Revised: 20 February 2018 / Accepted: 23 February 2018 / Published: 28 February 2018
(This article belongs to the Special Issue Extreme Time Scale Photonics)
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Abstract

This work investigates High Harmonic Generation (HHG) in gas targets, induced by intense two-colour driving fields. We compared classical trajectory Monte Carlo simulations based on a semiclassical model of strong field tunnel ionisation of helium to experimental HHG spectra, and investigated the relative contribution of long trajectories to low harmonic orders. This phenomenon can be found even when the experimental setup is chosen to suppress long trajectories and favour phase matching for short trajectories. View Full-Text
Keywords: high harmonic spectroscopy; classical trajectory Monte Carlo simulation; strong-field ionisation; two-colour high harmonic generation high harmonic spectroscopy; classical trajectory Monte Carlo simulation; strong-field ionisation; two-colour high harmonic generation
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Hofmann, C.; Landsman, A.S.; Keller, U. Disentangling Long Trajectory Contributions in Two-Colour High Harmonic Generation. Appl. Sci. 2018, 8, 341.

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