Auflistung Fakultät für Mathematik und Physik nach Autor/in "0967a898-3131-4b99-a266-a4673f7cf7b6"

Auflistung Fakultät für Mathematik und Physik nach Autor/in "0967a898-3131-4b99-a266-a4673f7cf7b6"

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  • Accurate propagation of ultrashort pulses in nonlinear waveguides using propagation models for the analytic signal 
    Melchert, O.; Morgner, Uwe; Roth, B.; Babushkin, I.; Demircan, A. (Bellingham, WA : SPIE - International Society for Optical Engineering, 2018)
    We present a numerical approach for the accurate simulation of the complex propagation dynamics of ultrashort optical pulses in nonlinear waveguides, especially valid for few-cycle pulses. The propagation models are derived ...
  • 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 ...
  • Crossover from two-frequency pulse compounds to escaping solitons 
    Melchert, O.; Willms, S.; Morgner, U.; Babushkin, I.; Demircan, A. ([London] : Macmillan Publishers Limited, part of Springer Nature, 2021)
    The nonlinear interaction of copropagating optical solitons enables a large variety of intriguing bound-states of light. We here investigate the interaction dynamics of two initially superimposed fundamental solitons at ...
  • Experimental study of self-induced transparency mode-locking in Ti:sapphire laser 
    Arkhipov, M.V.; Arkhipov, R.M.; Shimko, A.A.; Babushkin, I.; Rosanov, N.N. (Bristol : Institute of Physics Publishing, 2019)
    In this paper, passive mode-locking in Ti:sapphire laser with a coherent absorber cells with rubidium vapor placed in the cavity is demonstrated experimentally. For the best of our knowledge these experiments are the first ...
  • 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 ...
  • (Invited) Two-color soliton meta-atoms and molecules 
    Melchert, O.; Willms, S.; Babushkin, I.; Morgner, U.; Demircan, A. (München : Elsevier, 2023)
    We present a detailed overview of the physics of two-color soliton molecules in nonlinear waveguides, i.e. bound states of localized optical pulses which are held together due to an incoherent interaction mechanism. The ...
  • Passive and hybrid mode locking in multi-section terahertz quantum cascade lasers 
    Tzenov, P.; Babushkin, I.; Arkhipov, R.; Arkhipov, M.; Rosanov, N.; Morgner, Uwe; Jirauschek, C. (Bristol : Institute of Physics Publishing, 2018)
    It is believed that passive mode locking is virtually impossible in quantum cascade lasers (QCLs) because of too fast carrier relaxation time. Here, we revisit this possibility and theoretically show that stable mode locking ...
  • Population density gratings creation and control in resonant medium by half-cycle terahertz pulses 
    Arkhipov, R.M.; Arkhipov, M.V.; Pakhomov, A.V.; Babushkin, I.; Demircan, A.; Morgner, U.; Rosanov, N.N. (Bristol : IOP Publ., 2021)
    Electromagnetically induced gratings (EIG) are created by standing-wave laser field in resonant media. Such gratings can be also created by few-cycle electromagnetic pulses counter-propagating in the medium via coherent ...
  • Population density gratings induced by few-cycle optical pulses in a resonant medium 
    Arkhipov, R.M.; Pakhomov, A.V.; Arkhipov, M.V.; Babushkin, I.; Demircan, A.; Morgner, Uwe; Rosanov, N.N. (London : Nature Publishing Group, 2017)
    Creation, erasing and ultrafast control of population density gratings using few-cycle optical pulses coherently interacting with resonant medium is discussed. In contrast to the commonly used schemes, here the pulses do ...
  • Resonant Kushi-comb-like multi-frequency radiation of oscillating two-color soliton molecules 
    Melchert, O.; Willms, S.; Oreshnikov, I.; Yulin, A.; Morgner, U.; Babushkin, I.; Demircan, A. ([Bad Honnef] : Dt. Physikalische Ges., 2023)
    Nonlinear waveguides with two distinct domains of anomalous dispersion can support the formation of molecule-like two-color pulse compounds. They consist of two tightly bound subpulses with frequency loci separated by a ...
  • Soliton compression and supercontinuum spectra in nonlinear diamond photonics 
    Melchert, O.; Kinnewig, S.; Dencker, F.; Perevoznik, D.; Willms, S.; Babushkin, I.; Wurz, M.; Kues, M.; Beuchler, S.; Wick, T.; Morgner, U.; Demircan, A. (Amsterdam [u.a.] : Elsevier Science, 2023)
    We numerically explore synthetic crystal diamond for realizing novel light sources in ranges which are up to now difficult to achieve with other materials, such as sub-10-fs pulse durations and challenging spectral ranges. ...
  • Subwavelength population density gratings in resonant medium created by few-cycle pulses 
    Arkhipov, R.M.; Arkhipov, M.V.; Pakhomov, A.V.; Babushkin, I.; Demircan, A.; Morgner, Uwe; Rosanov, N.N. (Bristol : Institute of Physics Publishing, 2017)
    We consider theoretically recently proposed a new possibility of creation, erasing and ultrafast control of population density grating. Such grating can be created in resonant medium when ultrashort pulses with duration ...
  • 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 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 ...
  • Transverse structure and energy deposition by a subTW femtosecond laser in air: from single filament to superfilament 
    Pushkarev, D.; Mitina, E.; Shipilo, D.; Panov, N.; Uryupina, D.; Ushakov, A.; Volkov, R.; Karabutov, A.; Babushkin, I.; Morgner, Uwe; Kosareva, O.; Savel’ev, A. (London : IOP, 2019)
    We traced experimentally transition from a single air filament to the superfilament under action of powerful loosely focused (NA ~ 0.0021) femtosecond beam. Two regimes were exploited with multifilament formation by ...

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