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

  • Outlier Mining Methods Based on Graph Structure Analysis 

    Amil Marletti, Pablo; Almeira, Nahuel; Masoller Alonso, Cristina (Frontiers Media SA, 2019-11-26)
    Article
    Open Access
    Outlier detection in high-dimensional datasets is a fundamental and challenging problem across disciplines that has also practical implications, as removing outliers from the training set improves the performance of machine ...
  • Extreme-ultraviolet coherent pulse amplification in argon 

    Serrat Jurado, Carles; Seres, Jozsef; Seres, Enikoe; Namba, Shinichi (2019-06-25)
    Article
    Open Access
    The amplification of ultrashort extreme-ultraviolet (XUV) pulses in argon in high-order harmonic generation processes is studied by using the time-dependent Schrödinger equation in the spin-free one-active-electron and ...
  • Comparing the dynamics of periodically forced lasers and neurons 

    Tiana Alsina, Jordi; Quintero Quiroz, Carlos Alberto; Masoller Alonso, Cristina (2019-10-21)
    Article
    Open Access
    Neuromorphic photonics is a new paradigm for ultra-fast neuro-inspired optical computing that canrevolutionize information processing and artificial intelligence systems. To implement practicalphotonic neural networks is ...
  • Resonant, broadband, and highly efficient optical frequency conversion in semiconductor nanowire gratings at visible and UV wavelengths 

    Escalora, M.; Trull Silvestre, José Francisco; Cojocaru, Crina; Vincenti, M. A.; Carletti, Luca; Ceglia, Domenico de; Akozbek, Neset; De Angelis, C. (2019-08-01)
    Article
    Restricted access - publisher's policy
    Using a hydrodynamic approach, we examine bulk- and surface-induced second- and third-harmonic generationfrom semiconductor nanowire gratings having a resonant nonlinearity in the absorption region. We demonstrateresonant, ...
  • Experimental characterization of the speckle pattern at the output of a multimode optical fiber 

    Halpaap, Donatus; Tiana Alsina, Jordi; Vilaseca Ricart, Meritxell; Masoller Alonso, Cristina (2019-09-30)
    Article
    Open Access
    Speckle patterns produced by coherent waves interfering with each other are undesirable in many imaging applications (for example, in laser projection systems) but on the other hand, they contain useful information that ...
  • Regularization of vertical-cavity surface-emitting laser emission by periodic non-Hermitian potentials 

    Ahmed, Waqas Waseem; Herrero Simon, Ramon; Botey Cumella, Muriel; Wu, Ying; Staliunas, Kestutis (2019-08-15)
    Article
    Restricted access - publisher's policy
    We propose a novel physical mechanism based on periodicnon-Hermitian potentials to efficiently control the complexspatial dynamics of broad-area lasers, particularly in vertical-cavity surface-emitting lasers (VCSELs), ...
  • Characterization of speckle patterns generated by a semiconductor laser with optical feedback for speckle reduction in retinal imaging instruments 

    Halpaap, Donatus; Tiana Alsina, Jordi; Vilaseca Ricart, Meritxell; Masoller Alonso, Cristina (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2019)
    Conference lecture
    Restricted access - publisher's policy
    We study experimentally the operating conditions of a semiconductor laser diode subjected to different amounts of optical feedback in order to find a stable and cost-efficient solution for speckle reduction in double-pass ...
  • Network-based features for retinal fundus vessel structure analysis 

    Amil Marletti, Pablo; Reyes Manzano, César F.; Guzmán Vargas, Lev; Sendiña, Irene; Masoller Alonso, Cristina (Public Library of Science (PLOS), 2019-01-01)
    Article
    Open Access
    Retinal fundus imaging is a non-invasive method that allows visualizing the structure of the blood vessels in the retina whose features may indicate the presence of diseases such as diabetic retinopathy (DR) and glaucoma. ...
  • Harmonic generation in the opaque region of GaAs: the role of the surface and magnetic nonlinearities 

    Rodríguez Suñé, Laura; Trull Silvestre, José Francisco; Escalora, M.; Vilaseca Alavedra, Ramon; Cojocaru, Crina (2019-08-29)
    Article
    Open Access
    Phase-locked second and third harmonic generation in the opaque region of a GaAs wafer is experimentally observed and analyzed both in transmission and reflection. These harmonic components, which are generated close to ...
  • Exploiting the Nonlinear Dynamics of Optically Injected Semiconductor Lasers for Optical Sensing 

    Torre, Maria Susana; Masoller Alonso, Cristina (2019-06-01)
    Article
    Open Access
    Optically injected semiconductor lasers are known to display a rich variety of dynamic behaviours, including the emission of excitable pulses, and of rare giant pulses (often referred to as optical rogue waves). Here, we ...
  • Complex temporal patterns processing by a neural mass model of a cortical column 

    Malagarriga, Daniel; Pons Rivero, Antonio Javier; Villa, Alejandro E. P. (2019-04-06)
    Article
    Restricted access - publisher's policy
    It is well known that neuronal networks are capable of transmitting complex spatiotemporal information in the form of precise sequences of neuronal discharges characterized by recurrent patterns. At the same time, the ...
  • All-dielectric self-cloaked structures 

    Hayran, Zeki; Kurt, H.; Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis (2018-03-17)
    Article
    Open Access
    A general procedure to design objects that are intrinsically invisible (without the necessity of an external cloak) has not been demonstrated so far. Here we propose a flexible method to design such self-cloaked objects ...

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