https://doi.org/10.1140/epjd/e2003-00198-1
On the role of harmonics superimposed to the driving field in a harmonic generation process
Foundation for Research and Technology - Hellas, Institute of Electronic Structure & Laser, P.O. Box 1527, 711 10 Heraklion, Crete, Greece
and
University of Crete, Heraklion, Crete, Greece
Corresponding author: a papadogi@iesl.forth.gr
Received:
30
January
2003
Revised:
1
April
2003
Published online:
8
July
2003
The spatially integrated emission of harmonics from two along the propagation axis spatially separated sources has been investigated as a function of the relative phase and relative emission power of the two sources. Temporal interference fringes have been observed with frequency distributions including multiples of the driving Ti:sapphire laser frequency. The interference fringes provide evidence of harmonic emission that is sensitive to the relative emission phases and intensities of the two sources. Thus they demonstrate control of the emission at the following source by the harmonics emitted at the preceding one. The observed interference frequencies are discussed qualitatively and some of them are attributed to resonant processes.
PACS: 42.65.Ky – Frequency conversion; harmonic generation, including higher-order harmonic generation / 42.65.Re – Ultrafast processes; optical pulse generation and pulse compression / 32.80.Qk – Coherent control of atomic interactions with photons
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003
