scholarly journals Efficient extreme-ultraviolet multi-band high-order wave mixing in silica

2021 ◽  
Author(s):  
Filippo Campi ◽  
Sylvianne D. Roscam Abbing ◽  
Zhuang-Yan Zhang ◽  
Maarten van der Geest ◽  
Peter M. Kraus
Keyword(s):  
Extreme Ultraviolet ◽  
High Order ◽  
Wave Mixing ◽  
Multi Band

Wave-mixing with high-order harmonics in extreme ultraviolet region

2015 ◽  
Vol 106 (2) ◽  
pp. 021118 ◽  
Author(s):  
Lap Van Dao ◽  
Khuong Ba Dinh ◽  
Hoang Vu Le ◽  
Naylyn Gaffney ◽  
Peter Hannaford
Keyword(s):  
Extreme Ultraviolet ◽  
High Order ◽  
Ultraviolet Region ◽  
Wave Mixing

scholarly journals Attosecond source generation using polarized gating two-color field combined with unipolar pulse

2016 ◽  
Vol 94 (7) ◽  
pp. 651-658 ◽  
Author(s):  
Liqiang Feng ◽  
Hang Liu
Keyword(s):  
Harmonic Generation ◽  
Extreme Ultraviolet ◽  
Harmonic Spectrum ◽  
High Order ◽  
High Order Harmonic Generation ◽  
Emission Process ◽  
Harmonic Emission ◽  
High Order Harmonic ◽  
Unipolar Pulse ◽  
Color Field

High-order harmonic generation and attosecond extreme-ultraviolet source generation have been theoretically investigated by controlling the two-color polarized gating field combined with the unipolar pulse. The results show that by properly optimizing the polarized two-color field as well as the unipolar pulse, not only is the harmonic cutoff remarkably extended, but the single short quantum path has also been selected to contribute to the harmonic spectrum, resulting in a 313 eV less modulated supercontinuum. Classical and quantum analyses are shown to explain the harmonic emission process. Finally, the proper superposition of harmonics, a series of isolated sub-50 as pulses, can be obtained.

scholarly journals Phase-matched four-wave mixing in the extreme ultraviolet region

2018 ◽  
Vol 124 (1) ◽  
pp. 015901 ◽  
Author(s):  
Khoa Anh Tran ◽  
Khuong Ba Dinh ◽  
Peter Hannaford ◽  
Lap Van Dao
Keyword(s):  
Extreme Ultraviolet ◽  
Four Wave Mixing ◽  
Ultraviolet Region ◽  
Wave Mixing

scholarly journals Coupled Nuclear-Electronic Decay Dynamics of O2 Inner Valence Excited States Revealed by Attosecond XUV Wave-Mixing Spectroscopy

2020 ◽  
Author(s):  
Yen-Cheng Lin ◽  
Ashley Fidler ◽  
Arvinder Sandhu ◽  
Robert R. Lucchese ◽  
C. William McCurdy ◽  
...  
Keyword(s):  
Rydberg State ◽  
Extreme Ultraviolet ◽  
Strong Dependence ◽  
Model Systems ◽  
Theoretical Treatment ◽  
Wave Mixing ◽  
Rydberg Series ◽  
Transient Wave ◽  
Decay Channels ◽  
Vibrational Levels

Multiple Rydberg series converging to the O<sub>2</sub><sup>+</sup> 𝑐 <sup>4</sup>Σ<sub>𝑢</sub><sup>−</sup> state, accessed by 20-25 eV extreme ultraviolet (XUV) light, serve as important model systems for the competition between nuclear dissociation and electronic autoionization. The dynamics of the lowest member of these series, the <i>3sσg</i> state around 21 eV, has been challenging to study owing to its ultra-short lifetime (< 10 fs). Here, we apply transient wave-mixing spectroscopy with an attosecond XUV pulse to investigate the decay dynamics of this electronic state. Lifetimes of 5.8±0.5 fs and 4.5±0.7 fs at 95% confidence intervals are obtained for v=0 and v=1 vibrational levels of the 3s Rydberg state, respectively. A theoretical treatment of predissociation and electronic autoionization finds that these lifetimes are dominated by electronic autoionization. The strong dependence of the electronic autoionization rate on the internuclear distance because of two ionic decay channels that cross the <i>3s</i> Rydberg state results in the different lifetimes of the two vibrational levels. The calculated lifetimes are highly sensitive to the location of the <i>3s</i> potential with respect to the decay channels; by slight adjustment of the location, values of 6.2 and 5.0 fs are obtained computationally for the v=0 and v=1 levels, respectively, in good agreement with experiment. Overall, an intriguing picture of the coupled nuclear-electronic dynamics is revealed by attosecond XUV wave-mixing spectroscopy, indicating that the decay dynamics are not a simple competition between isolated autoionization and predissociation processes.

scholarly journals Extreme ultraviolet interferometry measurements with high-order harmonics

2000 ◽  
Vol 25 (2) ◽  
pp. 135 ◽  
Author(s):  
D. Descamps ◽  
C. Lyngå ◽  
J. Norin ◽  
A. L’Huillier ◽  
C.-G. Wahlström ◽  
...  
Keyword(s):  
Extreme Ultraviolet ◽  
High Order

scholarly journals Multidimensional spectroscopy with attosecond extreme ultraviolet and shaped near-infrared pulses

2018 ◽  
Vol 4 (9) ◽  
pp. eaau3783 ◽  
Author(s):  
Hugo J. B. Marroux ◽  
Ashley P. Fidler ◽  
Daniel M. Neumark ◽  
Stephen R. Leone
Keyword(s):  
Excited States ◽  
Near Infrared ◽  
Extreme Ultraviolet ◽  
Four Wave Mixing ◽  
High Dimensionality ◽  
Wave Mixing ◽  
Multidimensional Spectroscopy ◽  
Electronic Dynamics ◽  
Single State ◽  
Signal Field

Dynamics following excitation with attosecond extreme ultraviolet (XUV) pulses arise from enormous numbers of accessible excited states, complicating the retrieval of state-specific time evolutions. We develop attosecond XUV multidimensional spectroscopy here to separate interfering pathways on a near-infrared (NIR) energy axis, retrieving single state dynamics in argon atoms in a two-dimensional (2D) XUV-NIR spectrum. In this experiment, we measure four-wave mixing signal arising from the interaction of XUV attosecond pulses centered around 15 eV with two few-cycle NIR pulses. The 2D spectrum is created by measuring the emitted XUV signal field spectrum while applying narrowband amplitude and phase modulations to one of the NIR pulses. Application of such a technique to systems of high dimensionality will provide for the observation of state-resolved pure electronic dynamics, in direct analogy to phenomena unraveled by multidimensional spectroscopies at optical frequencies.

Instrumentation for analysis and utilization of extreme-ultraviolet and soft x-ray high-order harmonics

2004 ◽  
Vol 75 (11) ◽  
pp. 4413-4418 ◽  
Author(s):  
L. Poletto ◽  
S. Bonora ◽  
M. Pascolini ◽  
P. Villoresi
Keyword(s):  
Extreme Ultraviolet ◽  
High Order ◽  
X Ray

scholarly journals Near-resonant four-wave mixing of attosecond extreme-ultraviolet pulses with near-infrared pulses in neon: Detection of electronic coherences

2016 ◽  
Vol 94 (2) ◽  
Author(s):  
Wei Cao ◽  
Erika R. Warrick ◽  
Ashley Fidler ◽  
Stephen R. Leone ◽  
Daniel M. Neumark
Keyword(s):  
Near Infrared ◽  
Extreme Ultraviolet ◽  
Four Wave Mixing ◽  
Wave Mixing
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