RT Journal Article
T1 Boosting terahertz generation in laser-field ionized gases using a sawtooth wave shape
A1 González de Alaiza, Pedro
A1 Babushkin, Ihar
A1 Bergé, Luc
A1 Skupin, Stephan
A1 Cabrera Granado, Eduardo
A1 Köhler, Christian
A1 Mörgner, Uwe
A1 Husakou, Anton V.
A1 Herrmann, Jens
AB Broadband ultrashort terahertz (THz) pulses can be produced using plasma generation in a noble gas ionized by femtosecond two-color pulses. Here we demonstrate that, by using multiple-frequency laser pulses, one can obtain a waveform which optimizes the free electron trajectories in such a way that they acquire the largest drift velocity. This allows us to increase the THz conversion efficiency to 2%, an unprecedented performance for THz generation in gases. In addition to the analytical study of THz generation using a local current model, we perform comprehensive 3D simulations accounting for propagation effects which confirm this prediction. Our results show that THz conversion via tunnel ionization can be greatly improved with well-designed multicolor pulses.
PB American Physical Society
SN 0031-9007
YR 2015
FD 2015-05-06
LK https://hdl.handle.net/20.500.14352/23092
UL https://hdl.handle.net/20.500.14352/23092
LA eng
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NO © 2015 American Physical Society
NO DFG
DS Docta Complutense
RD 1 may 2024