Quasi-phase-matching high-harmonic radiation using chirped THz pulses
Optics
2014-02-17 v1
Abstract
High-order harmonic generation in the presence of a chirped THz pulse is investigated numerically with a complete 3D non-adiabatic model. The assisting THz pulse illuminates the HHG gas cell laterally inducing quasi-phase-matching. We demonstrate that it is possible to compensate the phase mismatch during propagation and extend the macroscopic cutoff of a propagated strong IR pulse to the single-dipole cutoff. We obtain two orders of magnitude increase in the harmonic efficiency of cutoff harmonics (170 eV) using a THz pulse of constant wavelength, and a further factor of 3 enhancement when a chirped THz pulse is used.
Keywords
Cite
@article{arxiv.1402.3434,
title = {Quasi-phase-matching high-harmonic radiation using chirped THz pulses},
author = {Katalin Kovács and Emeric Balogh and János Hebling and Valer Tosa and Katalin Varjú},
journal= {arXiv preprint arXiv:1402.3434},
year = {2014}
}