High-order harmonics and isolated-attosecond pulse generation of Three-Dimensional Hatom by UV-assisted chirped fields

2016 ◽  
Vol 7 (3) ◽  
pp. 135-145 ◽  
Author(s):  
J. Guo
Keyword(s):  
Three Dimensional ◽  
Pulse Generation ◽  
Attosecond Pulse ◽  
High Order ◽  
Isolated Attosecond Pulse ◽  
Attosecond Pulse Generation

scholarly journals Macroscopic effects of high-order harmonic and isolated attosecond pulse generation driven by two-color laser field

2011 ◽  
Vol 60 (10) ◽  
pp. 103202
Author(s):  
Lu Ying-Ying ◽  
Zeng Zhi-Nan ◽  
Zheng Ying-Hui ◽  
Zou Pu ◽  
Liu Can-Dong ◽  
...  
Keyword(s):  
Laser Field ◽  
Pulse Generation ◽  
Attosecond Pulse ◽  
High Order ◽  
High Order Harmonic ◽  
Isolated Attosecond Pulse ◽  
Attosecond Pulse Generation

XUV pulse effect on harmonic emission spectra and attosecond pulse generation

2017 ◽  
Vol 31 (34) ◽  
pp. 1750282 ◽  
Author(s):  
Liqiang Feng ◽  
R. S. Castle ◽  
Yi Li
Keyword(s):  
Near Infrared ◽  
Three Dimensional ◽  
Emission Spectra ◽  
Pulse Generation ◽  
Attosecond Pulse ◽  
High Order ◽  
Time Dependent ◽  
High Order Harmonic Generation ◽  
High Order Harmonic ◽  
Attosecond Pulse Generation

The generation of the high-order harmonic and the attosecond pulse from He atom driven by the near-infrared (NIR) field combined with the XUV pulse has been theoretically investigated by solving the three-dimensional time-dependent Schrödinger equation. The results show that by properly adding the XUV pulse into the NIR field, (i) not only the harmonic yield is enhanced, caused by the laser-induced excited state effect; but also the multi-cutoff extension of the harmonics can be found, caused by the absorption of the extra XUV photons during its recombination process. (ii) With the introduction of the XUV pulse, the frequency modulation of the high-order harmonic generation (HHG) can be found and controlled. (iii) By directly superposing the harmonics in the cutoff region, two isolated XUV pulses with the durations of 150 as can be obtained.

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