Work

Quasi-Phase-Matching High-Harmonic Radiation Using Chirped THz Pulses

Year: 2012

Type: article

Abstract: High-order harmonic generation in the presence of a chirped THz pulse is investigated numerically with a complete 3D nonadiabatic model. The assisting THz pulse illuminates the high-order harmonic generation 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 2 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.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.108.193903

Authors: Katalin Kovács, Emeric Balogh, János Hebling, Valer Toşa, Katalin Varjú

Institutions: University of Szeged, National Institute for Research and Development of Isotopic and Molecular Technologies, University of Pecs

Language: English

Topic: Laser-Matter Interactions and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2030713698

FWCI: 2.382

Cites: 24

Cited by: 55

Related to: 10