Auflistung nach Schlagwort "Terahertz waves"

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  • Boosting terahertz generation in laser-field ionized gases using a sawtooth wave shape 
    Martínez, P.G.D.A.; Babushkin, I.; Bergé, L.; Skupin, S.; Cabrera-Granado, E.; Köhler, C.; Morgner, Uwe; Husakou, A.; Herrmann, J. (American Physical Society, 2015)
    Broadband ultrashort terahertz (THz) pulses can be produced using plasma generation in a noble gas ionized by femtosecond two-color pulses. Here we demonstrate that, by using multiple-frequency laser pulses, one can obtain ...
  • Generation of sub cycle terahertz pulses via coherent control of nonlinear medium by femtosecond pulses 
    Arkhipov, R.M.; Arkhipov, M.V.; Pakhomov, A.V.; Babushkin, I.; Demircan, A.; Morgner, Uwe; Rosanov, N.N. (Bristol : IOP Publishing Ltd., 2020)
    In this paper, we revise our recent advances in study of high-efficient methods of sub cycle THz pulse generation and control of their wave shape. These methods are based on coherent control of low frequency oscillations ...
  • Photoconductivity of graphene devices induced by terahertz radiation at various photon energies 
    Salman, M.; Gouider, F.; Friedemann, M.; Schmidt, H.; Ahlers, Franz-J.; Göthlich, M.; Haug, Rolf J.; Nachtwei, G. (College Park, MD : American Institute of Physics, 2013)
    The influence of a magnetic field on Landau levels (LLs) in graphene-based devices is described via the magneto-optical response induced by terahertz (THz) radiation. For single-layer graphene, the resonance energies of ...
  • Symmetry Breaking and Strong Persistent Plasma Currents via Resonant Destabilization of Atoms 
    Brée, C.; Hofmann, M.; Demircan, A.; Morgner, Uwe; Kosareva, O.; Savel'Ev, A.; Husakou, A.; Ivanov, M.; Babushkin, I. (American Physical Society, 2017)
    The ionization rate of an atom in a strong optical field can be resonantly enhanced by the presence of long-living atomic levels (so-called Freeman resonances). This process is most prominent in the multiphoton ionization ...
  • Terahertz detectors based on graphene 
    Gouider, Fathi; Salman, Majdi; Göthlich, Markus; Schmidt, Hennrik; Ahlers, Franz-J.; Haug, Rolf J.; Nachtwei, Georg (Bristol : Institute of Physics Publishing, 2013)
    In this study we present magnetotransport an magnetooptical data obtained in the magnetic field range 0T < B < 7T at detectors patterned in Corbino geometry on epitaxial graphene wafer using a Ge detector. We observed ...
  • Terahertz pulse generation by two-color laser fields with circular polarization 
    Tailliez, C.; Stathopulos, A.; Skupin, S.; Buožius, D.; Babushkin, I.; Vaičaitis, V.; Bergé, L. (Bristol : IOP Publishing Ltd., 2020)
    We study the influence of the polarization states of ionizing femtosecond two-color pulses on the emitted terahertz radiation in gases. A local-current model and plane-wave evaluations justify the previously-reported impact ...