El grup de recerca treballa en dues temàtiques principals:
- L'estudi de fenòmens òptics lineals i no lineals en cristalls fotònics i microcavitats.
- L'estudi de la dinàmica espaciotemporal de sistemes no lineals, sobretot de làsers i sistemes òptics en general.

http://futur.upc.edu/DONLL

The research group works on two main topics: linear and nonlinear optical phenomena in photonic crystals and microcavities, and the spatiotemporal dynamics of nonlinear systems, in particular lasers and optical systems.

http://futur.upc.edu/DONLL

The research group works on two main topics: linear and nonlinear optical phenomena in photonic crystals and microcavities, and the spatiotemporal dynamics of nonlinear systems, in particular lasers and optical systems.

http://futur.upc.edu/DONLL

Recent Submissions

  • Sharp acoustic vortex focusing by Fresnel-spiral zone plates 

    Jimenez, Noe; Romero García, Vicenç; Garcia Raffi, Luis Miguel; Staliunas, Kestutis (2018-05-14)
    Article
    Restricted access - publisher's policy
    We report the optimal focusing of acoustic vortex beams by using flat lenses based on a Fresnel- spiral diffraction grating. The flat lenses are designed by spiral-shaped Fresnel zone plates composed of one or several arms. ...
  • Self-induced Faraday instability laser 

    Perego, A.M.; Smirnov, Sergey V.; Staliunas, Kestutis; Churkin, D.V.; Wabnitz, Stefan (American Institute of Physics (AIP), 2018-05-22)
    Article
    Open Access
    We predict the onset of self-induced parametric or Faraday instabilities in a laser, spontaneously caused by the presence of pump depletion, which leads to a periodic gain landscape for light propagating in the cavity. As ...
  • Sub-threshold signal encoding in coupled FitzHugh-Nagumo neurons 

    Masoliver Vila, Maria; Masoller Alonso, Cristina (Nature, 2018-05-29)
    Article
    Open Access
    Despite intensive research, the mechanisms underlying the neural code remain poorly understood. Recent work has focused on the response of a single neuron to a weak, sub-threshold periodic signal. By simulating the stochastic ...
  • Experimental study of modulation waveforms for entraining the spikes emitted by a semiconductor laser with optical feedback 

    Tiana Alsina, Jordi; Quintero Quiroz, Carlos Alberto; Panozzo, M.; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (2018-04-02)
    Article
    Open Access
    The entrainment phenomenon, by which an oscillator adjusts its natural rhythm to an external periodic signal, has been observed in many natural systems. Recently, attention has focused on which are the optimal conditions ...
  • A two dimensional KTiOPO4 photonic crystal grown using a macroporous silicon template 

    Peña Revellez, Alexandra; Finizio, Sergio Di; Todorov Trifonov, Trifon; Carvajal, Joan Josep; Aguiló Díaz, Magdalena; Pallarès Marzal, Josep; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; Marsal Garví, Lluís Francesc; Diaz, Francesc; Martorell Pena, Jordi (2006-09)
    Article
    Restricted access - publisher's policy
    2D KTiOPO4 photonic crystals are fabricated using a silicon membrane of air holes as a template. Columns of KTiOPO4 are grown by liquid-phase epitaxy from a substrate into such air holes. The crystallographic orientation ...
  • Quantifying changes in spatial patterns of surface air temperature dynamics over several decades 

    Zappala, Dario; Barreiro, Marcelo; Masoller Alonso, Cristina (2018-04-18)
    Article
    Open Access
  • Self-collimation in 2D Complex P- and PT-symmetric systems 

    Botey Cumella, Muriel; Ahmed Waseem, Waqas Waseem; Herrero Simon, Ramon; Staliunas, Kestutis (2017)
    Conference report
    Open Access
    We predict the self-collimation phenomena (or equivalently, dynamical localization) in 2-dimensional P-symmetric and PT-symmetric complex potentials, with periodic modulations of both gain/loss and refractive index. ...
  • PT-axisymmetry for extraordinary field confinement 

    Botey Cumella, Muriel; Ahmed Waseem, Waqas Waseem; Herrero Simon, Ramon; Staliunas, Kestutis (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2017)
    Conference report
    Open Access
    Optical Parity-Time (PT-) symmetric systems support unusual properties when the symmetric coupling between internal modes is broken. We propose a new class of quasiperiodic PT-axisymmetric systems which lead to a simultaneous ...
  • Self-collimated beams in 2D complex periodic lattices from P- to PT-symmetry 

    Ahmed Waseem, Waqas Waseem; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis (2017)
    Conference report
    Open Access
    We analyze self-collimation in two-dimensional periodic complex lattices. We consider P-symmetric and PT-symmetric complex lattices with different geometries, where the periodic modulations of both refractive index and ...
  • PT-axisymmetric VCSELs with linear central defect 

    Ahmed Waseem, Waqas Waseem; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Open Access
    Semiconductor Lasers and particularly Vertical-Cavity Surface-Emitting Lasers (VCSELs) are important laser sources used for many purposes. However, the applications of these lasers are mainly restricted by their strongly ...
  • Vertical Azimuth Display simulator for wind-Doppler lidar error assessment 

    Tiana Alsina, Jordi; Rocadenbosch Burillo, Francisco; Gutiérrez Antuñano, Miguel Ángel (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Open Access
    This works presents a simplified Vertical Azimuth Display (VAD) motion simulator for off-shore wind lidars. The simulator is rooted to the case of a conically-scanning lidar (e.g., the Zephyr lidar), where the wind speed ...
  • Comparative analysis of ferroelectric domain statistics via nonlinear diffraction in random nonlinear materials 

    Wang, Bin; Switowski, K; Cojocaru, Crina; Roppo, V; Sheng, Yan; Escalora, M.; Kisielewski, J.; Pawlak, D.; Vilaseca Alavedra, Ramon; Akhouayri, H.; Krolikowski, Wieslaw; Trull Silvestre, José Francisco (2018-01-22)
    Article
    Open Access
    We present an indirect, non-destructive optical method for domain statistic characterization in disordered nonlinear crystals having homogeneous refractive index and spatially random distribution of ferroelectric domains. ...

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