| Title |
Influence of tunnel ionization to third-harmonic generation of infrared femtosecond laser pulses in air / |
| Authors |
Tamulienė, Viktorija ; Juškevičiūtė, Greta ; Buožius, Danas ; Vaičaitis, Virgilijus ; Babushkin, Ihar ; Morgner, Uwe |
| DOI |
10.1038/s41598-020-74263-x |
| Full Text |
|
| Is Part of |
Scientific reports.. London : Nature publishing group. 2020, vol. 10, art. no. 17437, p. 1-12.. ISSN 2045-2322. eISSN 2045-2322 |
| Keywords [eng] |
femtosecond laser pulses ; third-harmonic generation ; plasma ionization |
| Abstract [eng] |
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. |
| Published |
London : Nature publishing group |
| Type |
Journal article |
| Language |
English |
| Publication date |
2020 |
| CC license |
|
