U. Teubner
Max Planck Society
Femtosecond pulse shapingPolarization (waves)IrradiationOpticsPhysicsElectron densityHarmonicFemtosecondUltrashort pulseAtomic physicsHarmonicsScatteringMaterials scienceElectron temperatureX-raySapphireSpectral lineOptoelectronicsAluminiumLaserWavelengthHigh harmonic generationIntensity (heat transfer)Plasma
Publications 15
#1Klaus Eidmann (MPG: Max Planck Society)H-Index: 28
#2Tetsuya Kawachi (MPG: Max Planck Society)H-Index: 2
Last. U. Teubner (MPG: Max Planck Society)H-Index: 11
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The emission of fundamental and harmonic radiation from the rear side of thin foils in the thickness range 50\char21{}460\phantom{\rule{0.3em}{0ex}}\mathrm{nm}irradiated by intense frequency doubled Ti:sapphire laser pulses of the duration of 150\phantom{\rule{0.3em}{0ex}}\mathrm{fs}and intensities up to a few {10}^{18}\phantom{\rule{0.3em}{0ex}}\mathrm{W}∕{\mathrm{cm}}^{2}was investigated. Following up a previous study of the rear side harmonic emission [Teubner et al., Phys. Rev. Lett...
#1U. TeubnerH-Index: 11
#2Klaus EidmannH-Index: 28
Last. T. SchlegelH-Index: 2
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This paper discusses the high-order harmonic generation (HOHG) at surface of dense matter (SDM) and concentrates on recent results obtained with high contrast ratio femtosecond laser driving pulses. It is shown that by the interaction of light with relativistic free electrons, relativistic non-linear optics has become achievable.
#1Andrius Marcinkevicius (MPG: Max Planck Society)H-Index: 19
#2Riccardo Tommasini (MPG: Max Planck Society)H-Index: 9
Last. U. Teubner (MPG: Max Planck Society)H-Index: 11
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We present an experimental and theoretical study of the influence of the spatial beam quality (fluence and phase distributions) on the second-harmonic generation in KDP crystals pumped by 180-fs pulses at 790 nm. Conversion efficiency and beam focusability are investigated experimentally and theoretically by the numerical analysis of the second harmonic, considering effects due to the cubic nonlinearity, beam diffraction, group-velocity walk-off, and dispersion of the pulses. It was found that t...
#10Eckhart Förster (Schiller International University)H-Index: 23
The harmonic emission from thin solid carbon and aluminum foils, irradiated by 150 fs long frequency-doubled Ti:sapphire laser pulses at \ensuremath{\lambda}=395\text{ }\text{ }\mathrm{nm}and peak intensities of a few {10}^{18}\text{ }\mathrm{W}/{\mathrm{cm}}^{2} has been studied. In addition to the harmonics emitted from the front side in the specular direction, we observe harmonics up to the 10th order, including the fundamental from the rear side in the direction of the incident beam, w...
#1U. Teubner (MPG: Max Planck Society)H-Index: 11
#2Ulrich Wagner (FSU: University of Jena)H-Index: 1
Last. Klaus Witte (MPG: Max Planck Society)H-Index: 21
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High-order harmonics generated by weakly relativistic femtosecond laser pulses interacting with solid and thin foil targets were studied. It was found that the conversion efficiency is one or two orders of magnitude larger than that of gas-harmonics and thus due to the high laser intensity also the harmonics are very intense. In addition, anomalies and complex interference structures have been observed in the harmonic spectra of the solid targets. They are explained by simulations. Furthermore, ...
#5Eckhart Förster (FSU: University of Jena)H-Index: 23
High-order harmonic generation from a solid target surface has been investigated using femtosecond laser pulses focused to intensities greater than 10{sup 18} W/cm{sup 2}. The experiments show that the harmonics are very intense, with a conversion efficiency that is one or two orders of magnitude larger than that of harmonics generated in gases. Beside the observation of presently the shortest wavelength harmonics from femtosecond-laser solid target interaction, i.e., down to 22 nm, an anomaly h...
Absorption of L-M and L-N transitions of nickel has been measured using point projection spectroscopy. The x-ray radiation from laser-irradiated gold cavities was used to heat volumetrically nickel foils "tamped with carbon" up to 20 eV. Experimental spectra have been analyzed with calculations based on the spin-orbit split arrays statistical approach and performed for each ionic species Ni 5 + to Ni 1 1 + . Using a least-squares fit, this method provides an ion distribution broader than at loca...
The interaction of high‐intensity subpicosecond KrF*‐laser pulses with aluminium plasmas is investigated at intensities between 1014 and 1017 W/cm2. Using a one‐dimensional hydrocode, the laser energy absorption and time evolution of plasma parameters have been studied as a function of laser intensity, incidence angle, and polarization. Complementary particle‐in‐cell simulations have also been performed to check the collisionless absorption component carried by hot electrons and ions. These simu...
The interaction of high‐intensity subpicosecond KrF*‐laser pulses with aluminum plasmas has been investigated. The laser pulse absorption and the x‐ray production have been related at a series of intensities up to 1017 W/cm2 and different angles of incidence. Soft x‐ray spectra were measured in the wavelength range from 7 to 150 A with various spectrographs. The spectra show distinct dependences on the laser intensity, the polarization, and the angle of incidence. The observed dependence of the ...
#4Eckhart FörsterH-Index: 23
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