Recent Submissions

  • Localized Core Four-Wave Mixing Buildup in the X-ray Spectrum of Chemical Species 

    Serrat Jurado, Carles (2021-01-20)
    Article
    Restricted access - publisher's policy
    Using the Kohn–Sham density functional theory, we numerically study the four-wave mixing response of a carbon atom model system exposed to a train of femtosecond two color ¿–3¿ random phase coherent X-ray pulses near the ...
  • Single-shot d-scan technique for ultrashort laser pulse characterization using transverse second-harmonic generation in random nonlinear crystals 

    Cojocaru, Crina; Trull Silvestre, José Francisco; Romero Muñiz, Rosa María; Sola Larrañaga, Iñigo Juan (2020-07-15)
    Article
    Restricted access - publisher's policy
    We demonstrate a novel dispersion-scan (d-scan) scheme for single-shot temporal characterization of ultrashort laser pulses. The novelty of this method relies on the use of a highly dispersive crystal featuring antiparallel ...
  • Restricted Hilbert Transform for Non-Hermitian Management of Fields 

    Waseem Ahmed, Waqas; Herrero Simon, Ramon; Botey Cumella, Muriel; Wu, Ying; Staliunas, Kestutis (2020-10-07)
    Article
    Open Access
    Non-Hermitian systems exploiting the synergy between the properties of closed-conservative systems and open-dissipative (gain-loss) systems have recently become the playground to uncover unusual physical phenomena. Indeed, ...
  • Estimation of wave period from pitch and roll of a lidar buoy 

    Salcedo Bosch, Andreu; Rocadenbosch Burillo, Francisco; Gutiérrez Antuñano, Miguel Ángel; Tiana Alsina, Jordi (Multidisciplinary Digital Publishing Institute (MDPI), 2021-02-12)
    Article
    Open Access
    This work proposes a new wave-period estimation (L-dB) method based on the power-spectral-density (PSD) estimation of pitch and roll motional time series of a Doppler wind lidar buoy under the assumption of small angles ...
  • Spatial filtering in edge-emitting lasers by intracavity chirped photonic crystals 

    Gawali, Sandeep Babu; Medina Pardell, Judith; Gailevicius, D.; Purlys, Vytautas; Garre Werner, Guillermo; Cojocaru, Crina; Trull Silvestre, José Francisco; Botey Cumella, Muriel; Herrero Simon, Ramon; Montiel Ponsoda, Joan; Staliunas, Kestutis (2020-10-01)
    Article
    Restricted access - publisher's policy
    In this work, we report an experimental and numerical study of the intracavity spatial filtering in edge-emitting lasers using a chirped photonic crystal (PhC) as the filtering element in the near-field domain. We provide ...
  • Testing Critical Slowing Down as a Bifurcation Indicator in a Low-Dissipation Dynamical System 

    Marconi, Mathias; Métayer, Cyrille; Acquaviva, A; Boyer, Jean Marc; Gomel, A; Quiniou, Thomas; Masoller Alonso, Cristina; Giudici, Massimo; Tredicce, Jorge R. (American Institute of Physics (AIP), 2020-09-25)
    Article
    Open Access
    We study a two-dimensional low-dissipation nonautonomous dynamical system, with a control parameter that is swept linearly in time across a transcritical bifurcation. We investigate the relaxation time of a perturbation ...
  • Nonlinear duffing oscillator model for third harmonic generation 

    Scalora, Michael; Vincenti, M. A.; Ceglia, Domenico de; Cojocaru, Crina; Grande, Manuel; Haus, J.W. (2015-10-01)
    Article
    Open Access
    We employ a classical, nonlinear Lorentz-Duffing oscillator model to predict third harmonic conversion efficiencies in the ultrafast regime, from a variety of metal nanostructures, including smooth, isolated metal layers, ...
  • Success rate analysis of the response of an excitable laser to periodic perturbations 

    Tiana Alsina, Jordi; Garbin, Bruno; Barland, Stéphane; Masoller Alonso, Cristina (2020-08-01)
    Article
    Restricted access - publisher's policy
    We use statistical tools to characterize the response of an excitable system to periodic perturbations. The system is an optically injected semiconductor laser under pulsed perturbations of the phase of the injected field. ...
  • Directional ultrasound source for solid materials inspection: diffraction management in a metallic phononic crystal 

    Mohamed Selim, Hossameldin; Pico Vila, Rubén; Trull Silvestre, José Francisco; Delgado Prieto, Miquel; Cojocaru, Crina (Multidisciplinary Digital Publishing Institute (MDPI), 2020-10-29)
    Article
    Open Access
    In this work, we numerically investigate the diffraction management of longitudinal elastic waves propagating in a two-dimensional metallic phononic crystal. We demonstrate that this structure acts as an “ultrasonic lens”, ...
  • Translationally invariant metamirrors for spatial filtering of light beams 

    Wang, Pei-Yu; Herrero Simon, Ramon; Botey Cumella, Muriel; Cheng, Yu-Chiech; Staliunas, Kestutis (American Physical Society (APS), 2020-07-01)
    Article
    Open Access
    We propose a translationally invariant metamirror for light filtering in reflection. The device consists of athin transverse grating in the micron scale positioned in front of a flat mirror. We analyze the performance ...
  • Parametric attosecond pulse amplification far from the ionization threshold from high order harmonic generation in He+ 

    Serrat Jurado, Carles; Seres, Jozsef; Seres, Enikoe; Dinh, T. H.; Hasegawa, N.; Nishikino, M.; Namba, S. (2020-07-31)
    Article
    Open Access
    Parametric 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 ...
  • Experimental study of speckle patterns generated by low-coherence semiconductor laser light 

    Halpaap Halpaap, Herbert Donatus; Marconi, Mathias; Yacomotti, Alejandro M.; Tiana Alsina, Jordi; Masoller Alonso, Cristina (Institute of Physics (IOP), 2020-06-01)
    Article
    Restricted access - publisher's policy
    Speckle is a wave interference phenomenon that has been studied in various fields, including optics, hydrodynamics, and acoustics. Speckle patterns contain spectral information of the interfering waves and of the scattering ...

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