Coherent soft-x-ray generation by the harmonics of an ultrahigh-power KrF laser

Sarukura, Nobuhiko; Hata, Kiyoshi; Adachi, Takashi; Nodomi, Ryoichi; Watanabe, Masayoshi; Watanabe, S.

doi:10.1103/physreva.43.1669

Cited by 186 publications

(81 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sarukura et al [12] have observed harmonics up to the 25th order in helium (9.9 nm) with the KrF radiation at intensities up to 10~8Wcm -2, which is far above the estimated cutoff wavelength and contradicts our observations. As already pointed out by Krause [21], it is believed that these high harmonics arise from ions produced by the high-intensity laser field.…”

Section: T a B L E Icontrasting

confidence: 56%

“…For ArF only the fifth harmonic could be observed in argon; for KrF up to the 1 lth harmonic in helium; and for Ti:sapphire in neon so far the 71st harmonic at 11 nm, the limit of the detection system. In the literature, for Ti:sapphire and KrF harmonics up to orders of 109 [10] and 25 [12] have been reported, whereas for ArF no higher harmonics than the fifth have been seen so far [25].…”

Section: Fixed Frequency Harmonic Generationmentioning

confidence: 99%

See 1 more Smart Citation

Generation of short-pulse VUV and XUV radiation

et al. 1996

View full text Add to dashboard Cite

Starting from intense short-pulse KrF (248nm, 25m J, 400fs), ArF (193nm, 10m J, ,.~1 ps), and Ti:sapphire (810nm, 100m J, 150fs) laser systems, schemes for the generation of fixed-frequency and tunable VUV and XUV radiation by nonlinear optical techniques are investigated. With the KrF system, a four-wave mixing process in xenon yields tunable radiation in the range of 130-200nm with output energies of, so far, 100 #J in less than 1 ps. For the XUV spectral range below 100 nm, nonperturbative high-order harmonic generation and frequency mixing processes in noble gas jets are considered. To achieve tunability, the intense fixed-frequency pump laser radiation is mixed with less intense but broadly tunable radiation from short-pulse dye lasers or optical parametric generator-amplifier systems. In this way, tunability down to wavelengths of less than 40 nm has been demonstrated.

show abstract

Section: T a B L E Icontrasting

confidence: 56%

Section: Fixed Frequency Harmonic Generationmentioning

confidence: 99%

Generation of short-pulse VUV and XUV radiation

et al. 1996

View full text Add to dashboard Cite

show abstract

“…60 Of particular interest is the study of the mechanism responsible for the production of the "higher" harmonics observed in the experiment 74 which cannot be explained by the SAE model. 36,37 Figure 6 shows that while the SAE model fails to produce the higher harmonics, the TDDFT/KLI-SIC results agree well with the experimental data in both lower and higher HHG regimes, indicating the important role played by the dynamical electron correlation.…”

Section: The Effect Of Dynamical Electron Correlation On the Hhg Of Rmentioning

confidence: 99%

Recent development of self-interaction-free time-dependent density-functional theory for nonperturbative treatment of atomic and molecular multiphoton processes in intense laser fields

Chu¹

2005

The Journal of Chemical Physics

View full text Add to dashboard Cite

A critical re-assignment of the Rydberg states of iodomethane based on new polarization data J. Chem. Phys. 138, 134308 (2013) In this paper, we present a short account of some recent developments of self-interaction-free density-functional theory ͑DFT͒ and time-dependent density-functional theory ͑TDDFT͒ for accurate and efficient treatment of the electronic structure, and time-dependent quantum dynamics of many-electron atomic and molecular systems. The conventional DFT calculations using approximate and explicit exchange-correlation energy functional contain spurious self-interaction energy and improper long-range asymptotic potential, preventing reliable treatment of the excited, resonance, and continuum states. We survey some recent developments of DFT/TDDFT with optimized effective potential ͑OEP͒ and self-interaction correction ͑SIC͒ for both atomic and molecular systems for overcoming some of the above mentioned difficulties. These DFT ͑TDDFT͒/ OEP-SIC approaches allow the use of orbital-independent single-particle local potential which is self-interaction free. In addition we discuss several numerical techniques recently developed for efficient and high-precision treatment of the self-interaction-free DFT/TDDFT equations. The usefulness of these procedures is illustrated by a few case studies of atomic, molecular, and condensed matter processes of current interests, including ͑a͒ autoionizing resonances, ͑b͒ relativistic OEP-SIC treatment of atomic structure ͑Z = 2-106͒, ͑c͒ shell-filling electronic structure in quantum dots, ͑d͒ atomic and molecular processes in intense laser fields, including multiphoton ionization, and very-high-order harmonic generation, etc. For the time-dependent processes, an alternative Floquet formulation of TDDFT is introduced for time-independent treatment of multiphoton processes in intense periodic or quasiperiodic fields. We conclude this paper with some open questions and perspectives of TDDFT.

show abstract

“…The relationship between the nonlinear polarization Pq(r, t) and the driving electric field El(r, t) is Pq(r, t) = (2q-l)l N 1 (r, t)xq)]E(r, t), (2) where Xy'q) is the qth-order nonlinear susceptibility of the atomic (or ionic) species i and Ni(r, t) is the spatially and temporally dependent atomic (or ionic) number density.…”

Section: Numerical Modelmentioning

confidence: 99%

“…' The shortest harmonic wavelengths have been produced by high-intensity KrF lasers (249 nm), with which orders up to 25 (9.96 nm) have been produced. 2 However, with the development of high-brightness neodymium lasers, harmonic orders as high as 53 (19.9 nm) have been produced with laser intensities in the range 103 to 5 X 1014 W cm-2.3…”

Section: Introductionmentioning

confidence: 99%

Studies of time-resolved harmonic generation in intense laser fields in xenon

et al. 1992

View full text Add to dashboard Cite

We report preliminary experimental and computational studies of the temporal evolution of the harmonics, generated in xenon, by 50-ps pulses from a Nd: YLF laser, amplified in Nd: glass amplifiers, and focused to produce intensities in the range 1013-5 X 1013 W cm 2 . Measurements were made of the temporal profiles of the seventh-and ninth-order harmonics using a specially modified VUV streak camera with better than 7-ps temporal resolution. These results were compared with predictions of a numerical model that included the effects of neutral atom depletion and photoelectron dispersion in the calculation of the harmonic output as a function of time.

show abstract

Coherent soft-x-ray generation by the harmonics of an ultrahigh-power KrF laser

Cited by 186 publications

References 21 publications

Generation of short-pulse VUV and XUV radiation

Generation of short-pulse VUV and XUV radiation

Recent development of self-interaction-free time-dependent density-functional theory for nonperturbative treatment of atomic and molecular multiphoton processes in intense laser fields

Studies of time-resolved harmonic generation in intense laser fields in xenon

Contact Info

Product

Resources

About