Browsing by Author "Seres, Enikoe"
Now showing items 1-12 of 12
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All-solid-state VUV frequency comb at 160 nm using high-harmonic generation in nonlinear femtosecond enhancement cavity
(2019-02-21)
Article
Open AccessWe realized a solid-state-based vacuum ultraviolet frequency comb by harmonics generation in an external enhancement cavity. Optical conversions were so far reported by only using gaseous media. We present a theory that ... -
Attosecond sublevel beating and nonlinear dressing on the 3d-to-5p and 3p-to-5s core-transitions at 91.3 eV and 210.4 eV in krypton
(2017-12-11)
Article
Open AccessApplying extreme ultraviolet (XUV) transient absorption spectroscopy, the dynamics of the two laser dressed transitions 3d5/2-to-5p3/2 and 3p3/2-to-5s1/2 at photon energies of 91.3 eV and 210.4 eV were examined with ... -
Avalanche of stimulated forward scattering in high harmonic generation
(2016-04-05)
Article
Open AccessOptical amplifiers in all ranges of the electromagnetic spectrum exhibit an essential characteristic, namely the input signal during the propagation in the amplifier medium is multiplied by the avalanche effect of the ... -
Core-level attosecond transient absorption spectroscopy of laser-dressed solid films of Si and Zr
(American Physical Society, 2016-10-12)
Article
Open AccessWe investigated experimentally as well as theoretically the ultrafast response of the wave function of the conduction band (CB) of Si and Zr to a near-infrared laser field using extreme ultraviolet (XUV) absorption ... -
Extreme-ultraviolet coherent pulse amplification in argon
(2019-06-25)
Article
Open AccessThe amplification of ultrashort extreme-ultraviolet (XUV) pulses in argon in high-order harmonic generation processes is studied by using the time-dependent Schrödinger equation in the spin-free one-active-electron and ... -
High harmonic generation in AlN due to out-of-surface electron orbitals
(Optical Society of American (OSA), 2021-01-15)
Article
Open AccessHigh harmonic generation in solids is commonly considered as a bulk process. However, there is a controversy whether the experimentally observed effects can in their entirety be described by a pure bulk model. Our results ... -
Non-perturbative generation of DUV/VUV harmonics from crystal surfaces at 108 MHz repetition rate
(2018-08-08)
Article
Open AccessWe demonstrate non-perturbative 3rd (267 nm) and 5th (160 nm) harmonic generation in solids from a Ti:sapphire frequency comb (800 nm) at 108 MHz repetition rate. The experiments show that non-perturbative low harmonics ... -
Nonlinear propagation effect in x-ray parametric amplification during high harmonic generation
(2022-04-01)
Article
Open AccessWe report the realization and characterization of parametric amplification in high harmonic generation around 100 eV using He gas in a double gas jet arrangement. The delay of the seed extreme ultraviolet (XUV) pulse with ... -
Parametric attosecond pulse amplification far from the ionization threshold from high order harmonic generation in He+
(2020-07-31)
Article
Open AccessParametric amplification of attosecond coherent pulses around 100 eV at the single– atom level is demonstrated for the first time by using the 3D time–dependent Schrödinger equation in high–harmonic generation processes ... -
Soft-X-Ray High-Harmonic Source for Attosecond Transient Absorption Spectroscopy of Laser Dressed Gases and Solids
(Optica Publishing Group, 2019)
Conference report
Restricted access - publisher's policyA soft-X-ray high harmonic source has been developed and applied for time-resolved Xray absorption spectroscopy of Krypton gas, Silicon and Zirconium solids at laser dressed transitions up to 220 eV with attosecond resolution. -
Spectral shift and split of harmonic lines in propagation affected high harmonic generation in a long-interaction gas tube
(2023-12)
Article
Open AccessWhile generating high harmonics in long media of helium gas, at certain laser intensities and chirp, the spectral shift and split of the harmonic lines were experimentally observed, sometimes exceeding one harmonic order. ... -
VUV Frequency Comb by Cavity-Enhanced High Harmonic Generation on Solid Surfaces
(Optical Society of American (OSA), 2019)
Conference report
Restricted access - publisher's policyUsing an enhancement cavity, a sub-Watt power Ti:sapphire femtosecond frequency comb is enhanced to 24 W and 3rd, 5th and 7th harmonics are generated in a non-perturbative manner on the surface of thin AlN layer.
