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  • Shopper intent prediction from clickstream e-commerce data with minimal browsing information 

    Requena Pozo, Borja; Cassani, Giovanni; Tagliabue, Jacopo; Greco, Ciro; Lacasa, Lucas (Nature, 2020-10-12)
    Article
    Open Access
    We address the problem of user intent prediction from clickstream data of an e-commerce website via two conceptually different approaches: a hand-crafted feature-based classification and a deep learning-based classification. ...
  • Tomato and melon Meloidogyne resistant rootstocks improve crop yield but melon fruit quality is influenced by the cropping season 

    Expósito Creo, Alejandro; Pujolà Cunill, Montserrat; Achaerandio Puente, María Isabel; Giné Blasco, Ariadna; Escudero Benito, Nuria; Fullana Pons, Aïda Magdalena; Cunquero Navarro, Marina; Loza Álvarez, Pablo; Sorribas Royo, Francisco Javier (2020-11-05)
    Article
    Open Access
    Four rotation sequences consisting of ungrafted tomato cv. Durinta – melon cv. Paloma or tomato grafted onto the resistant rootstock ‘Aligator’ – melon grafted onto the resistant Cucumis metuliferus accession BGV11135, and ...
  • Second harmonic generation from an ITO nanolayer: experiment versus theory 

    Rodríguez Suñé, Laura; Scalora, Michael; Johnson, Allan; Cojocaru, Crina; Akozbek, Neset; Coppens, Zachary; Pérez Salinas, Daniel; Wall, Simon; Trull Silvestre, José Francisco (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2020)
    Conference report
    Open Access
    We report a comparative experimental and theoretical study of second harmonic generation from a 20nm-thick indium tin oxide nanolayer in the proximity of the epsilon-near-zero condition. We record the efficiency of the ...
  • Relation between Fluorescence Quantum Yield and Open-Circuit Voltage in Complete Perovskite Solar Cells 

    Kramarenko, Mariia; Ferreira, Catarina G.; Martínez-Denegrí Sánchez, Guillermo; Sansierra, Constanza; Toudert, Johann; Martorell Pena, Jordi (Wiley, 2020-04)
    Article
    Open Access
    Bringing the Voc of a perovskite solar cell toward its radiative value, corresponding to a 100% external fluorescence quantum yield (QY) of the cell, has been pursued to reach the highest performance photovoltaic devices. ...
  • Topology Transitions of Anisotropy Induced Bound States in the Continuum 

    Mukherjee, Samyobrata; Gomis Bresco, Jordi; Pujol Closa, Maria del Pilar; Artigas García, David; Torner Sabata, Lluís (2018)
    Conference report
    Open Access
    We demonstrate that Bound states In the Continuum (BICs) are supported in planar anisotropic structures where the optic axes are arbitrarily oriented. Moreover, we reveal fundamental new topological properties of these ...
  • Existence loci of bound states in the continuum in the parameter space of anisotropic planar structures 

    Mukherjee, Samyobrata; Gomis Bresco, Jordi; Pujol Closa, Maria del Pilar; Artigas García, David; Torner Sabata, Lluís (Optical Society of American (OSA), 2019)
    Conference lecture
    Open Access
    Bound states in the continuum (BICs), first predicted in the field of quantum physics [1], are localized radiationless states existing in the part of the spectrum that corresponds to radiative modes. BICs are a general ...
  • Waveguide stopped light mediated by mode transitions 

    Pujol Closa, Maria del Pilar; Gomis Bresco, Jordi; Gomez Diaz, J. Sebastian; Artigas García, David (Optical Society of American (OSA), 2019)
    Conference lecture
    Open Access
    Hyperbolic metamaterials (HMMs) are uniaxial materials that have hyperbolic dispersion curves. There are two types of hyperbolic metamaterials, type I that is described by a permittivity tensor with e|| < 0 and e¿ > 0, and ...
  • Angular control of anisotropy-induced bound states in the continuum 

    Mukherjee, Samyobrata; Gomis Bresco, Jordi; Pujol Closa, Maria del Pilar; Artigas García, David; Torner Sabata, Lluís (2019-11-01)
    Article
    Open Access
    Radiation of leaky modes existing in anisotropic waveguides can be cancelled by destructive interference at special propagation directions relative to the optical axis orientation, resulting in fully bound states surrounded ...
  • Water splitting for hydrogen chemisorption in graphene oxide dynamically evolving to a graphane character lattice 

    Ciammaruchi, Laura; Bellucci, Luca; Comerón Castillo, Gabriel; Martínez-Denegrí Sánchez, Guillermo; Liu, Quan; Tozzini, Valentina; Martorell Pena, Jordi (2019-11-01)
    Article
    Restricted access - publisher's policy
    Graphane offers a safe and high capacity hydrogen storage. Unfortunately, production of graphane directly from its parent material graphene requires breaking the extended p bond, implying either harsh chemical environments ...
  • Inverse Optical Cavity Design for Ultrabroadband Light Absorption Beyond the Conventional Limit in Low-Bandgap Nonfullerene Acceptor–Based Solar Cells 

    Liu, Quan; Toudert, Johann; Li, Tengfei; Kramarenko, Mariia; Martínez-Denegri Sánchez, Guillermo; Ciammaruchi, Laura; Zhan, Xiaowei; Martorell Pena, Jordi (2019-05-23)
    Article
    Open Access
    In the subwavelength regime, several nanophotonic configurations have been proposed to overcome the conventional light trapping or light absorption enhancement limit in solar cells also known as the Yablonovitch limit. It ...
  • Formamidinium Incorporation into Compact Lead Iodide for Low Band Gap Perovskite Solar Cells with Open-Circuit Voltage Approaching the Radiative Limit 

    Zhang, Hui; Kramarenko, Mariia; Martínez-Denegri Sánchez, Guillermo; Osmond, Johann; Martorell Pena, Jordi (2019-03-06)
    Article
    Open Access
    To bring hybrid lead halide perovskite solar cells toward the Shockley-Queisser limit requires lowering the band gap while simultaneously increasing the open-circuit voltage. This, to some extent divergent objective, may ...