Perturbative wave-mixing and amplification in the extreme ultraviolet region

2016 ◽  
Author(s):  
Lap Van Dao ◽  
Peter Hannaford
Keyword(s):  
Extreme Ultraviolet ◽  
Ultraviolet Region ◽  
Wave Mixing

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 Perturbative Nonlinear Optics in the Extreme Ultraviolet Region

2017 ◽  
Vol 27 (2) ◽  
pp. 97
Author(s):  
Lap Van Dao ◽  
Peter Hannaford
Keyword(s):  
Nonlinear Optics ◽  
Laser Pulse ◽  
High Intensity ◽  
Extreme Ultraviolet ◽  
Ultraviolet Region ◽  
Wave Mixing ◽  
Mixing Process ◽  
Free Electrons ◽  
Low Intensity ◽  
Multiple Cycle

We report the investigation of the wave-mixing process with two multiple-cycle pulses having incommensurate frequencies (at 1400 nm and 800 nm). With a collinear and non-collinear configuration of the two beams, a different extreme ultraviolet (XUV) mixing field can be created at low intensity of the 800 nm field. For a high intensity of the second laser pulse we are able to amplify the XUV radiation. We show that the dynamics of the free electrons can be revealed from the frequency mixing process.

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 Four-wave mixing with multi-color laser in extreme ultraviolet region

2021 ◽  
Author(s):  
Thong Huy Chau ◽  
Khuong Ba Dinh ◽  
Khoa Anh Tran ◽  
Peter Hannaford ◽  
Lap Van Dao
Keyword(s):  
Extreme Ultraviolet ◽  
Four Wave Mixing ◽  
Ultraviolet Region ◽  
Wave Mixing

Effect of energetic electron and proton bombardment on the reflectance of silicon-carbide mirrors in the extreme-ultraviolet region

1994 ◽  
Vol 33 (25) ◽  
pp. 5902 ◽  
Author(s):  
G. E. Holland ◽  
J. F. Seely ◽  
R. P. McCoy ◽  
K. F. Dymond ◽  
C. Rollins ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Extreme Ultraviolet ◽  
Energetic Electron ◽  
Ultraviolet Region ◽  
Proton Bombardment

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 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.

Wave-Front Quality Analysis of Three-Dimension Pinhole Vector Diffractional in Extreme Ultraviolet Region

2010 ◽  
Vol 30 (10) ◽  
pp. 2849-2854 ◽  
Author(s):  
卢增雄 Lu Zengxiong ◽  
金春水 Jin Chunshui ◽  
张立超 Zhang Lichao ◽  
王丽萍 Wang Liping
Keyword(s):  
Wave Front ◽  
Extreme Ultraviolet ◽  
Quality Analysis ◽  
Ultraviolet Region ◽  
Three Dimension
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