RT Journal Article
T1 Spectral self-action of THz emission from ionizing two-color laser pulses in gases
A1 Cabrera Granado, Eduardo
A1 Chen, Yxing
A1 Babushkin, Ihar
A1 Bergé, Luc
A1 Skupin, Stephan
AB The spectrum of terahertz (THz) emission in gases via ionizing two-color femtosecond pulses is analyzed by means of a semi-analytic model and numerical simulations in 1D, 2D and 3D geometries taking into account propagation effects of both pump and THz fields. We show that produced THz signals interact with free electron trajectories and thus significantly influence further THz generation upon propagation, i.e., make the process inherently nonlocal. This self-action contributes to the observed strong spectral broadening of the generated THz field. We show that diffraction of the generated THz radiation is the limiting factor for the co-propagating low frequency amplitudes and thus for the self-action mechanism in 2D and 3D geometries.
PB IOP Publishing
SN 1367-2630
YR 2015
FD 2015-02-18
LK https://hdl.handle.net/20.500.14352/24685
UL https://hdl.handle.net/20.500.14352/24685
LA eng
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DS Docta Complutense
RD 27 abr 2024