Highly coherent high-energy high-order harmonic generation

2001 ◽  
Author(s):  
Katsumi Midorikawa ◽  
Eiji Takahashi ◽  
Yusake Tamaki ◽  
Yutaka Nagata ◽  
Yasuo Nabekawa
Keyword(s):  
Harmonic Generation ◽  
High Energy ◽  
High Order ◽  
High Order Harmonic Generation ◽  
High Order Harmonic

scholarly journals Postcompression of high-energy terawatt-level femtosecond pulses and application to high-order harmonic generation

2015 ◽  
Vol 32 (6) ◽  
pp. 1055 ◽  
Author(s):  
Ondřej Hort ◽  
Antoine Dubrouil ◽  
Amélie Cabasse ◽  
Stéphane Petit ◽  
Eric Mével ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
High Energy ◽  
High Order ◽  
Femtosecond Pulses ◽  
High Order Harmonic Generation ◽  
High Order Harmonic

scholarly journals Femtosecond Single Cycle Pulses Enhanced the Efficiency of High Order Harmonic Generation

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 610
Author(s):  
Abdelmalek Taoutioui ◽  
Hicham Agueny
Keyword(s):  
Harmonic Generation ◽  
Near Infrared ◽  
High Energy ◽  
High Order ◽  
Single Cycle ◽  
High Order Harmonic Generation ◽  
Displacement Effect ◽  
High Order Harmonic ◽  
Matter Interaction ◽  
Light Matter Interaction

High-order harmonic generation is a nonlinear process that converts the gained energy during light-matter interaction into high-frequency radiation, thus resulting in the generation of coherent attosecond pulses in the XUV and soft x-ray regions. Here, we propose a control scheme for enhancing the efficiency of HHG process induced by an intense near-infrared (NIR) multi-cycle laser pulse. The scheme is based on introducing an infrared (IR) single-cycle pulse and exploiting its characteristic feature that manifests by a non-zero displacement effect to generate high-photon energy. The proposed scenario is numerically implemented on the basis of the time-dependent Schrödinger equation. In particular, we show that the combined pulses allow one to produce high-energy plateaus and that the harmonic cutoff is extended by a factor of 3 compared to the case with the NIR pulse alone. The emerged high-energy plateaus is understood as a result of a vast momentum transfer from the single-cycle field to the ionized electrons while travelling in the NIR field, thus leading to high-momentum electron recollisions. We also identify the role of the IR single-cycle field for controlling the directionality of the emitted electrons via the IR-field induced electron displacement effect. We further show that the emerged plateaus can be controlled by varying the relative carrier-envelope phase between the two pulses as well as the wavelengths. Our findings pave the way for an efficient control of light-matter interaction with the use of assisting femtosecond single-cycle fields.

Relativistic high-order harmonic generation

2003 ◽  
Vol 50 (3-4) ◽  
pp. 375-386
Author(s):  
D. B. MilosÕeviĆ ◽  
W. Becker
Keyword(s):  
Harmonic Generation ◽  
High Order ◽  
High Order Harmonic Generation ◽  
High Order Harmonic
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