TY - JOUR
T1 - High-order harmonic generation at high laser intensities beyond the tunnel regime Guest editors
T2 - Germán J. de Valcárcel, Luis Roso and Amelle Zaïr
AU - Pérez-Hernández, Jose Antonio
AU - Ciappina, Marcelo F.
AU - Lewenstein, Maciej
AU - Zaïr, Amelle
AU - Roso, Luis
N1 - Publisher Copyright:
© 2014 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.
PY - 2014/7
Y1 - 2014/7
N2 - We present studies of high-order harmonic generation (HHG) at laser intensities well above saturation. We use driving laser pulses which present a particular electron dynamics in the turn-on stage. Our results predict an increasing on the harmonic yield, after an initial dropping, when the laser intensity is increased. This fact contradicts the general belief of a progressive degradation of the harmonic emission at ultrahigh intensities. We have identified a particular set of trajectories which emerges in the turn-on stage of these singular laser pulses, responsible of the unexpected growth on the harmonic efficiency at this high intensity regime. Our study combines two complementary approaches: classical analysis and full quantum mechanical calculations resulting from the numerical integration of the 3-dimensional time-dependent Schrödinger equation complemented with the time-frequency analysis.
AB - We present studies of high-order harmonic generation (HHG) at laser intensities well above saturation. We use driving laser pulses which present a particular electron dynamics in the turn-on stage. Our results predict an increasing on the harmonic yield, after an initial dropping, when the laser intensity is increased. This fact contradicts the general belief of a progressive degradation of the harmonic emission at ultrahigh intensities. We have identified a particular set of trajectories which emerges in the turn-on stage of these singular laser pulses, responsible of the unexpected growth on the harmonic efficiency at this high intensity regime. Our study combines two complementary approaches: classical analysis and full quantum mechanical calculations resulting from the numerical integration of the 3-dimensional time-dependent Schrödinger equation complemented with the time-frequency analysis.
UR - http://www.scopus.com/inward/record.url?scp=84920427455&partnerID=8YFLogxK
U2 - 10.1140/epjd/e2014-50086-6
DO - 10.1140/epjd/e2014-50086-6
M3 - 文章
AN - SCOPUS:84920427455
SN - 1434-6060
VL - 68
JO - European Physical Journal D
JF - European Physical Journal D
IS - 7
M1 - 195
ER -