High-harmonic generation in an intense femtosecond laser field

2000 ◽  
Author(s):  
ChangHee Nam ◽  
H. J. Shin ◽  
DongGun Lee ◽  
Yong H. Cha ◽  
KyungHan Hong
Keyword(s):  
Femtosecond Laser ◽  
Harmonic Generation ◽  
Laser Field ◽  
High Harmonic ◽  
High Harmonic Generation

scholarly journals Ultrafast Dynamics of High-Harmonic Generation in Terms of Complex Floquet Spectral Analysis

Symmetry ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 313 ◽  
Author(s):  
Hidemasa Yamane ◽  
Satoshi Tanaka
Keyword(s):  
Spectral Analysis ◽  
Harmonic Generation ◽  
Laser Field ◽  
Quantum Interference ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
Spectral Features ◽  
Quantum Process ◽  
Time Regime ◽  
Long Time

We studied the high-harmonic generation (HHG) of a two-level-system (TLS) driven by an intense monochromatic phase-locked laser based on complex spectral analysis with the Floquet method. In contrast with phenomenological approaches, this analysis deals with the whole process as a coherent quantum process based on microscopic dynamics. We have obtained the time-frequency resolved spectrum of spontaneous HHG single-photon emission from an excited TLS driven by a laser field. Characteristic spectral features of the HHG, such as the plateau and cutoff, are reproduced by the present model. Because the emitted high-harmonic photon is represented as a superposition of different frequencies, the Fano profile appears in the long-time spectrum as a result of the quantum interference of the emitted photon. We reveal that the condition of the quantum interference depends on the initial phase of the driving laser field. We have also clarified that the change in spectral features from the short-time regime to the long-time regime is attributed to the interference between the interference from the Floquet resonance states and the dressed radiation field.

Highly Efficient High-Harmonic Generation in an Orthogonally Polarized Two-Color Laser Field

2005 ◽  
Vol 94 (24) ◽  
Author(s):  
I Jong Kim ◽  
Chul Min Kim ◽  
Hyung Taek Kim ◽  
Gae Hwang Lee ◽  
Yong Soo Lee ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Laser Field ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
Highly Efficient

Enhancing high harmonic generation by the global optimization of a two-color chirped laser field

2019 ◽  
Vol 21 (18) ◽  
pp. 9302-9309 ◽  
Author(s):  
Mohammad Mofared ◽  
Elnaz Irani ◽  
Rasoul Sadighi-Bonabi
Keyword(s):  
Global Optimization ◽  
Harmonic Generation ◽  
Laser Field ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
High Harmonics ◽  
Supercontinuum Spectrum

Enhanced high harmonics are generated by local and global optimization approaches to achieve a supercontinuum spectrum.

scholarly journals Robust enhancement of high harmonic generation via attosecond control of ionization

2019 ◽  
Vol 205 ◽  
pp. 02008
Author(s):  
Barry D. Bruner ◽  
Talya Arusi-Parpar ◽  
Michael Krüger ◽  
Oren Pedatzur ◽  
Gal Orenstein ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Laser Field ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
Ionization Rate ◽  
Generation Efficiency

We demonstrate up to two orders of magnitude enhancements in high harmonic generation efficiency via sub-cycle control and scaling of the ionization rate in a two colour laser field.

Control of the high harmonic generation spectra by changing the molecule-laser field relative orientation

2010 ◽  
Vol 27 (4) ◽  
pp. 625 ◽  
Author(s):  
Rosalba Daniele ◽  
Francesca Morales ◽  
Giuseppe Castiglia ◽  
Pietro Paolo Corso ◽  
Gianfranco Orlando ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Laser Field ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
Relative Orientation

Carrier-envelope phase effects on high-harmonic generation driven by mid-infrared laser field

2014 ◽  
Vol 23 (10) ◽  
pp. 104210
Author(s):  
Han-Hu Diao ◽  
Ying-Hui Zheng ◽  
Yue Zhong ◽  
Zhi-Nan Zeng ◽  
Xiao-Chun Ge ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Laser Field ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
Infrared Laser ◽  
Mid Infrared ◽  
Carrier Envelope Phase
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