FS-ATTO

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2019-06-25
10:27
Embargoed OpenAccess [PUBDB-2019-02576] Journal Article
et al
Atomic-resolution imaging of carbonyl sulfide by laser-induced electron diffraction
Measurements on the strong-field ionization of carbonyl sulfide molecules by short, intense, 2 µm wavelength laser pulses are presented from experiments where angle-resolved photoelectron distributions were recorded with a high-energy velocity map imaging spectrometer, designed to reach a maximum kinetic energy of 500 eV. The laser-field-free elastic-scattering cross section of carbonyl sulfide was extracted from the measurements and is found in good agreement with previous experiments, performed using conventional electron diffraction. [...]
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ddc:530
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2019-05-16
12:47
OpenAccess [PUBDB-2019-02297] Journal Article/Contribution to a conference proceedings
et al
Strong-field physics in the molecular frame
XXI International Conference on Ultrafast Phenomena 2018, UP 2018, HamburgHamburg, Germany, 15 Jul 2018 - 20 Jul 20182018-07-152018-07-20 The European physical journal / Web of Conferences 205, 07002 () [10.1051/epjconf/201920507002]  GO
Laser-aligned carbonyl-sulfide molecules were strong-field ionized using mid-infrared light. Investigating the strong-field effects in the molecular frame allowed to add novel facets to the understanding of the intrinsic nature of strong-field physics..
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ddc:530
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2019-05-16
09:36
OpenAccess [PUBDB-2019-02294] Journal Article/Contribution to a conference proceedings
et al
Generation and complete temporal characterization of 5-fs EUV pulses
XXI International Conference on Ultrafast Phenomena 2018, UP 2018, HamburgHamburg, Germany, 15 Jul 2018 - 20 Jul 20182018-07-152018-07-20 The European physical journal / Web of Conferences 205, 02009 () [10.1051/epjconf/201920502009]  GO
Extreme-ultraviolet pulses as short as 5 fs, produced by high- order harmonic generation and selected by a time-delay compensated monochromator, were fully reconstructed thanks to an advanced ptychographic technique, while most commonly used reconstruction methods fail. These pulses constitute the shortest extreme ultraviolet pulses ever achieved via a time-delay compensated monochromator..
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ddc:530
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2019-05-14
14:52
[PUBDB-2019-02274] Lecture
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Molecular and Ultrafast Science Seminar (MUSS)
Lecture at Universität Hamburg (Hamburg, Germany), 1 Apr 2019 - 13 Jul 20192019-04-012019-07-13
CFEL Molecular and Ultrafast Science Seminar (MUSS) series. This is a general topical seminar series on developments in modern molecular and ultrafast science jointly organized by the CFEL Controlled Molecule Imaging group, the Spectroscopy of molecular processes group, the CFEL Attosecond Science group, and the CFEL Ultrafast Optics group. [...]
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2019-05-14
14:03
[PUBDB-2019-02269] Lecture
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CFEL Molecular and Ultrafast Science Seminar (MUSS)
Lecture at Universität Hamburg (), 15 Oct 2018 - 2 Feb 20192018-10-152019-02-02
CFEL Molecular and Ultrafast Science Seminar (MUSS) series. This is a general topical seminar series on developments in modern molecular physics organized by the CFEL Controlled Molecule Imaging group, the Spectroscopy of molecular processes group, the CFEL Attosecond Science group, and the CFEL Ultrafast Optics group. [...]
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2019-02-21
16:02
OpenAccess [PUBDB-2019-01201] Journal Article
et al
Generation of deep ultraviolet sub-2-fs pulses
Optics letters 44(6), 1308 - 1311 () [10.1364/OL.44.001308]  GO
We demonstrate the generation of few-cycle deep ultraviolet pulses via frequency upconversion of 5-fs near-infrared pulses in argon using a laser-fabricated gas cell. The measured spectrum extends from 210 to 340 nm, corresponding to a transform-limited pulse duration of 1.45 fs [...]
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2019-01-28
11:38
OpenAccess [PUBDB-2019-00763] Journal Article
et al
Reconstruction of the time-dependent electronic wave packet arising from molecular autoionization
Science advances 4(8), eaat3962 - () [10.1126/sciadv.aat3962]  GO
Autoionizing resonances are paradigmatic examples of two-path wave interferences between direct photoionization, which takes a few attoseconds, and ionization via quasi-bound states, which takes much longer. Time-resolving the evolution of these interferences has been a long-standing goal, achieved recently in the helium atom owing to progress in attosecond technologies [...]
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ddc:500
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2019-01-11
11:24
[PUBDB-2019-00394] Journal Article
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Solvent control of charge transfer excited state relaxation pathways in $\mathrm{[Fe(2,2′-bipyridine)(CN)_{4} ]^{2−}}$
The excited state dynamics of solvated $[Fe(bpy)(CN)_{4}]^{2−}$, where bpy = 2,2′-bipyridine, show significant sensitivity to the solvent Lewis acidity. Using a combination of optical absorption and X-ray emission transient spectroscopies, we have previously shown that the metal to ligand charge transfer (MLCT) excited state of $[Fe(bpy)(CN)_{4}]^{2−}$ has a 19 picosecond lifetime and no discernable contribution from metal centered (MC) states in weak Lewis acid solvents, such as dimethyl sulfoxide and acetonitrile.1,2 In the present work, we use the same combination of spectroscopic techniques to measure the MLCT excited state relaxation dynamics of $[Fe(bpy)(CN)_{4}]^{2−}$ in water, a strong Lewis acid solvent. [...]
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ddc:540
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2019-01-11
11:13
[PUBDB-2019-00392] Journal Article
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Photostability and Photodegradation Processes in Colloidal $\mathrm{CsPbI_{3}}$ Perovskite Quantum Dots
ll-inorganic $\mathrm{CsPbI_{3}}$ perovskite quantum dots (QDs) have attracted intense attention for their successful application in photovoltaics (PVs) and optoelectronics that are enabled by their superior absorption capability and great photoluminescence (PL) properties. However, their photostability remains a practical bottleneck and further optimization is highly desirable. [...]
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ddc:600
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2019-01-10
11:21
[PUBDB-2019-00272] Journal Article
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Inorganic Ions Assisted the Anisotropic Growth of $\mathrm{CsPbCl_{3}}$ Nanowires with Surface Passivation Effect
All-inorganic halide perovskite nanowires (NWs) exhibit improved thermal and hydrolysis stability and could thus play a vital role in nanoscale optoelectronics. Among them, blue-light-based devices are extremely limited because of the lack of a facile method to obtain high-purity $\mathrm{CsPbCl_{3}}$ NWs. [...]
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