General characterization of partially oriented polar molecules by the time-frequency profile of high-order harmonic generation

2020 ◽  
Vol 102 (6) ◽  
Author(s):  
Ngoc-Loan Phan ◽  
Kim-Ngan H. Nguyen ◽  
Cam-Tu Le ◽  
DinhDuy Vu ◽  
Khang Tran ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
High Order ◽  
Polar Molecules ◽  
High Order Harmonic Generation ◽  
Frequency Profile ◽  
Time Frequency ◽  
General Characterization ◽  
High Order Harmonic

scholarly journals Characterization of a dual-gas multi-jet gas puff target for high-order harmonic generation using extreme ultraviolet shadowgraphy

2013 ◽  
Vol 31 (2) ◽  
pp. 219-227 ◽  
Author(s):  
P.W. Wachulak ◽  
L. Wegrzynski ◽  
A. Bartnik ◽  
T. Fok ◽  
R. Jarocki ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Extreme Ultraviolet ◽  
High Order ◽  
High Order Harmonic Generation ◽  
Density Profiles ◽  
Modes Of Operation ◽  
High Order Harmonic ◽  
Pulsed Injection ◽  
First Time

AbstractCharacterization measurements and modes of operation of a novel, dual-gas multi-jet target, developed for experiments on high-order harmonic generation, are presented. The target has been formed by pulsed injection of argon through a nozzle in a form of linearly oriented small orifices. The argon jets were separated with the helium jets formed by injection of helium through alternate orifices in the nozzle. The targets have been characterized by extreme ultraviolet backlighting at 13.5 nm wavelength. Density profiles for this type of targets have been obtained, to our knowledge, for the first time.

scholarly journals Generation and complete temporal characterization of 5-fs EUV pulses

2019 ◽  
Vol 205 ◽  
pp. 02009
Author(s):  
Matteo Lucchini ◽  
Giacinto D. Lucarelli ◽  
Mario Murari ◽  
Andrea Trabattoni ◽  
Nicola Fabris ◽  
...  
Keyword(s):  
Time Delay ◽  
Harmonic Generation ◽  
Extreme Ultraviolet ◽  
High Order ◽  
High Order Harmonic Generation ◽  
High Order Harmonic ◽  
Reconstruction Methods

Extreme-ultraviolet pulses as short as 5 fs, produced by high-order harmonic generation and selected by a time-delay compensated monochromator, were fully reconstructed thanks to an advanced ptychographic technique, while most commonly used reconstruction methods fail. These pulses constitute the shortest extreme ultraviolet pulses ever achieved via a time-delay compensated monochromator.

scholarly journals Quasi-phase matching and characterization of high-order harmonic generation in hollow waveguides using counterpropagating light

2008 ◽  
Vol 16 (9) ◽  
pp. 6544 ◽  
Author(s):  
Amy L. Lytle ◽  
Xiaoshi Zhang ◽  
Richard L. Sandberg ◽  
Oren Cohen ◽  
Henry C. Kapteyn ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
High Order ◽  
Phase Matching ◽  
High Order Harmonic Generation ◽  
Hollow Waveguides ◽  
High Order Harmonic ◽  
Quasi Phase Matching

Theoretical study of high-order harmonic generation from the hydrogen molecular ion with a dichromatic spatially inhomogeneous field

2018 ◽  
Vol 32 (14) ◽  
pp. 1850141 ◽  
Author(s):  
Xiao-Hu Xu ◽  
Yan-Jun Wang ◽  
Xiang-Yang Miao
Keyword(s):  
Harmonic Generation ◽  
Laser Field ◽  
Spectral Width ◽  
High Order ◽  
Inhomogeneous Field ◽  
High Order Harmonic Generation ◽  
Hydrogen Molecular Ion ◽  
Molecular Ion ◽  
Time Frequency ◽  
High Order Harmonic

We theoretically investigate the enhancement of high-order harmonic generation by numerically solving the non-Born–Oppenheimer time-dependent Schrödinger equation from the hydrogen molecular ion in a dichromatic inhomogeneous laser field. An ultrabroad supercontinuum up to 300 orders spectral width is generated. It is found that not only the inhomogeneity, but also the dichromatic field contributes to the significant extension of the harmonic cutoff compared with a monochromatic inhomogeneous laser field. Meanwhile, the long quantum paths can be suppressed and short ones can be enhanced by selecting optimized inhomogeneous parameter [Formula: see text], intensity and carrier envelope phase of the dichromatic inhomogeneous laser field. Furthermore, by superposing a properly selected range of the harmonic spectrum in the continuum region, an isolated 29-as pulse is generated. Both the classical theory and quantum time–frequency analysis are adopted to explain the physical mechanism.

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