Synthesis of ultrashort laser pulses for high-order harmonic generation

0501433 - FZÚ 2019 RIV US eng J - Článek v odborném periodiku
Neyra, E. - Videla, F. - Ciappina, Marcelo F. - Perez-Hernandez, J. A. - Roso, L. - Torchia, G.A.
Synthesis of ultrashort laser pulses for high-order harmonic generation.
Physical Review A. Roč. 98, č. 1 (2018), s. 1-8, č. článku 013403. ISSN 2469-9926. E-ISSN 2469-9934
Grant CEP: GA MŠMT LQ1606
Institucionální podpora: RVO:68378271
Klíčová slova: barrier-suppression regime * multicycle lasers * attosecond pulses * field * ionization * physics * atoms
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 2.907, rok: 2018

We present a technique for the synthesis of ultrashort laser pulses with approximately one cycle (FWHM) of temporal duration. These pulses are characterized by a certain degree of chirp. We show that these pulses produce both an enhancement of the high-order harmonic generation (HHG) cutoff and a noticeable increase of the yield, when interacting with an atomic system. Additionally, the asymmetric nature of the driven pulses plays an important role in the efficiency and cutoff extension of the high-order harmonics generated. Starting from the HHG spectra, we demonstrate it is possible to retrieve isolated attosecond pulses by spectral filtering.
Trvalý link: http://hdl.handle.net/11104/0293467