Controls for the generation of high-order harmonics and attosecond pulses by an infrared laser field combined with a low-frequency pulse

2012 ◽  
Vol 21 (8) ◽  
pp. 080202 ◽  
Author(s):  
Hai-Xiang He ◽  
Ya-Hui Guo ◽  
Guo-Zhong He
Keyword(s):  
Laser Field ◽  
Low Frequency ◽  
Infrared Laser ◽  
High Order ◽  
Attosecond Pulses ◽  
Frequency Pulse

High-order harmonic generation with a single-color mid-infrared laser field by frequency-chirping

2019 ◽  
Vol 33 (13) ◽  
pp. 1950122 ◽  
Author(s):  
Yunhui Wang ◽  
Dandan Song ◽  
Qiang Zuo ◽  
Hong Wu ◽  
Zhihong Yang
Keyword(s):  
Harmonic Generation ◽  
Laser Field ◽  
Infrared Laser ◽  
Pulse Generation ◽  
High Order ◽  
Time Dependent ◽  
Mid Infrared ◽  
High Order Harmonic ◽  
Isolated Attosecond Pulse ◽  
Frequency Chirping

By numerically solving the time-dependent Schrödinger equation for helium atoms in a single mid-infrared laser field, we explore the frequency-chirping effect of laser field on high-order harmonic and isolated attosecond pulse generation. One or two ultrabroad supercontinuum harmonic plateaus can be controlled through modulating the laser field frequency by a small time-dependent signal. Under the best chirping condition, an ultrashort 2.2 as pulse can be obtained by Fourier transformation with the bandwidth of 782 eV. Furthermore, we explain the harmonic generation physical mechanisms by classical ionizing and returning energy maps and time–frequency analyzes.

Relativistic high-order harmonics of a hydrogenlike atom in an ultrastrong laser field

1999 ◽  
Vol 77 (7) ◽  
pp. 521-529 ◽  
Author(s):  
J Chen ◽  
K H Li ◽  
J H Wen
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Conversion Efficiency ◽  
Laser Field ◽  
Pulse Shape ◽  
High Order ◽  
Laser Parameters ◽  
Hydrogenlike Atom ◽  
Frequency Pulse

The relativistic high-order harmonics of a hydrogenlike atom in an ultrastrong laser field has been simulated by the classical Monte-Carlo method in this paper. The results concerning the influence of the laser parameters (frequency, pulse-shape, intensity, etc.) on the relativistic high-order harmonics have been obtained and the conversion efficiency has also been calculated. Some conclusions are drawn and discussed.PACS Nos.: 42.65Ky and 32.80Rm

scholarly journals HIGH-ORDER HARMONICS FROM TWO-LEVEL ATOMS IN LASER FIELD WITH LOW-FREQUENCY

1998 ◽  
Vol 47 (9) ◽  
pp. 1458
Author(s):  
QU WEI-XING ◽  
YU WEI ◽  
HU SU-XING ◽  
XU ZHI-ZHAN
Keyword(s):  
Laser Field ◽  
Low Frequency ◽  
High Order

High-order harmonic wave fronts generated with controlled astigmatic infrared laser

2008 ◽  
Vol 25 (7) ◽  
pp. B161 ◽  
Author(s):  
Constance Valentin ◽  
Julien Gautier ◽  
Jean-Philippe Goddet ◽  
Christoph Hauri ◽  
Tatiana Marchenko ◽  
...  
Keyword(s):  
Harmonic Wave ◽  
Infrared Laser ◽  
High Order ◽  
Wave Fronts ◽  
High Order Harmonic
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