Auflistung nach Schlagwort "ionization"

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  • Angular dependence of the Wigner time delay upon tunnel ionization of H2 
    Trabert, D.; Brennecke, S.; Fehre, K.; Anders, N.; Geyer, A.; Grundmann, S.; Schöffler, M. S.; Schmidt, L. Ph. H.; Jahnke, T.; Dörner, R.; Kunitski, M.; Eckart, S. ([London] : Nature Publishing Group UK, 2021)
    When a very strong light field is applied to a molecule an electron can be ejected by tunneling. In order to quantify the time-resolved dynamics of this ionization process, the concept of the Wigner time delay can be used. ...
  • Femtosecond Field-Driven On-Chip Unidirectional Electronic Currents in Nonadiabatic Tunneling Regime 
    Shi, Liping; Babushkin, Ihar; Husakou, Anton; Melchert, Oliver; Frank, Bettina; Yi, Juemin; Wetzel, Gustav; Demircan, Ayhan; Lienau, Christoph; Giessen, Harald; Ivanov, Misha; Morgner, Uwe; Kovacev, Milotin (Weinheim : Wiley VCH, 2021)
    Recently, asymmetric plasmonic nanojunctions have shown promise as on-chip electronic devices to convert femtosecond optical pulses to current bursts, with a bandwidth of multi-terahertz scale, although yet at low temperatures ...
  • High-order harmonic spectroscopy in an ionized high-density target 
    Kurz, Heiko G.; Kretschmar, Martin; Binhammer, Thomas; Nagy, Tamas; Ristau, Detlev; Lein, Manfred; Morgner, Uwe; Kovačev, Milutin (Lausanne : Frontiers Media, 2022)
    We use high-order harmonic spectroscopy to study ionization dynamics in a macroscopic target with tunable density, spanning over six orders of magnitude. In an in situ pump-probe experiment, the target is prepared at ...
  • Influence of Reduced Field Strength on Product Ion Formation in High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS) 
    Schaefer, Christoph; Allers, Maria; Kirk, Ansgar T.; Schlottmann, Florian; Zimmermann, Stefan (Washington, DC : ACS Publications, 2021-06-25)
    Classical ion mobility spectrometers (IMS) operated at ambient pressure, often use atmospheric pressure chemical ionization (APCI) sources to ionize organic compounds. In APCI, reactant ions ionize neutral analyte molecules ...
  • Influence of Sample Gas Humidity on Product Ion Formation in High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS) 
    Schaefer, Christoph; Schlottmann, Florian; Kirk, Ansgar T.; Zimmermann, Stefan (Washington, DC : ACS Publications, 2022-05-20)
    High Kinetic Energy Ion Mobility Spectrometers (HiKE-IMS) chemically ionize gaseous samples via reactant ions and separate the generated ions by their motion in a neutral gas under the influence of an electric field. ...
  • Influence of tunnel ionization to third-harmonic generation of infrared femtosecond laser pulses in air 
    Tamulienė, Viktorija; Juškevičiūtė, Greta; Buožius, Danas; Vaičaitis, Virgilijus; Babushkin, Ihar; Morgner, Uwe (London : Nature Publishing Group, 2020)
    Here we present an experimental as well as theoretical study of third-harmonic generation in tightly focused femtosecond filaments in air at the wavelength of 1.5μm. At low intensities, longitudinal phase matching is ...
  • Investigation of ion-ion-recombination at atmospheric pressure with a pulsed electron gun 
    Heptner, Andre; Cochems, Philipp; Langejuergen, Jens; Gunzer, Frank; Zimmermann, Stefan (Cambridge : Royal Society of Chemistry, 2012)
    For future development of simple miniaturized sensors based on pulsed atmospheric pressure ionization as known from ion mobility spectrometry, we investigated the reaction kinetics of ion-ion-recombination to establish ...
  • Revealing the Microscopic Real-Space Excursion of a Laser-Driven Electron 
    Kurz, Heiko G.; Kretschmar, Martin; Binhammer, Thomas; Nagy, Tamas; Ristau, Detlev; Lein, Manfred; Morgner, Uwe; Kovacev, Milutin (College Park : American Physical Society, 2016)
    High-order harmonic spectroscopy allows one to extract information on fundamental quantum processes, such as the exit time in the tunneling of an electron through a barrier with attosecond time resolution and molecular ...
  • Ultrafast polychromatic ionization of dielectric solids 
    Jürgens, P.; Jupé, M.; Gyamfi, M.; Ristau, Detlev (Bellingham, WA : S P I E - International Society for Optical Engineering, 2016)
    The modeling of the laser-induced damage processes can be divided into thermal and electronic processes. Especially, electronic damage seems to be well understood. In corresponding models, the damage threshold is linked ...