Coherently controlled ionization of gases by three-color femtosecond laser pulses

0557009 - FZÚ 2023 RIV US eng J - Journal Article
Wang, S. - Lu, C. - Fan, Z. - Houard, A. - Tikhonchuk, Vladimir - Mysyrowicz, A. - Zhuang, S. - Kostin, V. A. - Liu, Y.
Coherently controlled ionization of gases by three-color femtosecond laser pulses.
Physical Review A. Roč. 105, č. 22 (2022), č. článku 023529. ISSN 2469-9926. E-ISSN 2469-9934
Institutional support: RVO:68378271
Keywords : photoionization * femtosecond laser * high-harmonic generation
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 2.9, year: 2022
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevA.105.023529

Photoionization of atoms and molecules by intense femtosecond laser pulses is a fundamental process of strong-field physics. Using a three-color femtosecond laser scheme with attosecond phase control precision, we demonstrate coherently controlled ionization of nitrogen molecules with a modulation level up to 45% by varying the phase shifts between the fundamental laser frequency at 800 nm and its second and third harmonics. Furthermore, the phase dependence of the ionization degree qualitatively changes with the laser intensity ratios between the three colors. The observations are interpreted as a manifestation of the competition between different parametric channels contributing to the ionization process.
Permanent Link: http://hdl.handle.net/11104/0331133