Details
| Original language | English |
|---|---|
| Article number | 17437 |
| Journal | Scientific reports |
| Volume | 10 |
| Issue number | 1 |
| Publication status | Published - 15 Oct 2020 |
Abstract
Here we present an experimental as well as theoretical study of third-harmonic generation in tightly focused femtosecond filaments in air at the wavelength of 1.5μm. At low intensities, longitudinal phase matching is dominating in the formation of 3rd harmonics, whereas at higher intensities locked X-waves are formed. We provide the arguments that the X-wave formation is governed mainly by the tunnel-like ionization dynamics rather than by the multiphoton one. Despite of this fact, the impact of the ionization-induced nonlinearity is lower than the one from bound–bound transitions at all intensities.
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In: Scientific reports, Vol. 10, No. 1, 17437, 15.10.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of tunnel ionization to third-harmonic generation of infrared femtosecond laser pulses in air
AU - Tamulienė, Viktorija
AU - Juškevičiūtė, Greta
AU - Buožius, Danas
AU - Vaičaitis, Virgilijus
AU - Babushkin, Ihar
AU - Morgner, Uwe
N1 - Funding Information: This research was funded by a Grant (No. S-MIP-19-46) from the Research Council of Lithuania. I.B. and U.M thank Deutsche Forschungsgemeinschaft (DFG; German Research Foundation), projects BA 4156/4-2, MO 850-19/2, and MO 850-23/1, Bundesministerium für Bildung und Forschung (BMBF, project: THG-Schicht (13N14063)), as well as Germany’s Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122; Project ID 390833453) for financial support.
PY - 2020/10/15
Y1 - 2020/10/15
N2 - Here we present an experimental as well as theoretical study of third-harmonic generation in tightly focused femtosecond filaments in air at the wavelength of 1.5μm. At low intensities, longitudinal phase matching is dominating in the formation of 3rd harmonics, whereas at higher intensities locked X-waves are formed. We provide the arguments that the X-wave formation is governed mainly by the tunnel-like ionization dynamics rather than by the multiphoton one. Despite of this fact, the impact of the ionization-induced nonlinearity is lower than the one from bound–bound transitions at all intensities.
AB - Here we present an experimental as well as theoretical study of third-harmonic generation in tightly focused femtosecond filaments in air at the wavelength of 1.5μm. At low intensities, longitudinal phase matching is dominating in the formation of 3rd harmonics, whereas at higher intensities locked X-waves are formed. We provide the arguments that the X-wave formation is governed mainly by the tunnel-like ionization dynamics rather than by the multiphoton one. Despite of this fact, the impact of the ionization-induced nonlinearity is lower than the one from bound–bound transitions at all intensities.
UR - http://www.scopus.com/inward/record.url?scp=85092580774&partnerID=8YFLogxK
U2 - 10.1038/s41598-020-74263-x
DO - 10.1038/s41598-020-74263-x
M3 - Article
C2 - 33060640
AN - SCOPUS:85092580774
VL - 10
JO - Scientific reports
JF - Scientific reports
SN - 2045-2322
IS - 1
M1 - 17437
ER -