Now showing items 1-15 of 15

    • A GPU parallel randomized CUR compression method for the Method of Moments 

      López Menchón, Héctor; Heldring, Alexander; Úbeda Farré, Eduard; Rius Casals, Juan Manuel (2023-06-01)
      Article
      Restricted access - publisher's policy
      In this work, we propose a GPU parallel implementation of the randomized CUR (or Pseudo Skeleton) Approximation to compress the -matrices of linear systems that arise in the discretization of integral equations modeling ...
    • A model for photocurrent generation in photoconductive antennas 

      López Menchón, Héctor; Revuelta Martinez, Sergio; Santos Blanco, M. Concepción; Romeu Robert, Jordi; Rius Casals, Juan Manuel (2019)
      Conference lecture
      Restricted access - publisher's policy
      The laser-induced current carrier generation and transport under large biasing voltages in photoconductive materials located in electrode gap region of photoconductive antennas is a complex process involving many different ...
    • A Monte Carlo method for solving the electromagnetic scattering problem in dielectric bodies with massive parallelization 

      López Menchón, Héctor; Rius Casals, Juan Manuel; Úbeda Farré, Eduard; Heldring, Alexander (Unión Científica Internacional de Radio (URSI), 2021)
      Conference report
      Restricted access - publisher's policy
      In this work, we develop a novel Monte Carlo method for solving the electromagnetic scattering problem. The method is based on a formal representation of the solution as a modified Born series whose coefficients are found ...
    • A Parallel Monte Carlo Algorithm for Solving the Scattering Problem in Plasmonic Nanoparticles 

      López Menchón, Héctor (Universitat Politècnica de Catalunya, 2019-10-25)
      Master thesis
      Open Access
      We propose an extension of the Ulam-Neumann algorithm for solving system of equations arising from photonic problems. This method has good parallel properties and allows to implement acceleration techniques.
    • A parallel Monte Carlo method for solving electromagnetic scattering in clusters of dielectric objects 

      López Menchón, Héctor; Úbeda Farré, Eduard; Heldring, Alexander; Rius Casals, Juan Manuel (Elsevier, 2022-08-15)
      Article
      Restricted access - publisher's policy
      In this work, we develop a novel Monte Carlo method for solving the electromagnetic scattering problem for clusters of photonic particles. The method is based on a formal solution of the scattering problem as a modified ...
    • Acceleration of Born series by change of variables 

      López Menchón, Héctor; Rius Casals, Juan Manuel; Heldring, Alexander; Úbeda Farré, Eduard (2021-09)
      Article
      Open Access
      In this work, we propose a method to enhance the convergence of the Born series. The Born series is widely used in scattering theory, but its convergence is only guaranteed under certain restrictive conditions which limit ...
    • Geometric algebra formulation of the Calderon Projector 

      López Menchón, Héctor; Rius Casals, Juan Manuel; Úbeda Farré, Eduard; Heldring, Alexander (2019)
      Conference lecture
      Restricted access - publisher's policy
      Geometric Algebra provides a mathematical frame-work that allows to express many equations of physics in a more compact way [1]. It unifies the electric and the magnetic field in a single mathematical object: a multivector. ...
    • Grid design benchmark on sheets with nonzero thickness 

      Úbeda Farré, Eduard; Rius Casals, Juan Manuel; Heldring, Alexander; López Menchón, Héctor (Universitat Politècnica de Catalunya. Remote Sensing, Antennas, Microwaves and Superconductivity Group (CommSensLab), 2022)
      Conference report
      Open Access
      The conventional scattering analysis of perfectly conducting sheets ignores the scattering contribution of the rim. The so-called thin-surface scheme arises from the discretization of the Electric-field Integral Equation ...
    • Impact of bias field screening and dipole length in terahertz photoconductive antennas 

      Schönenberger, David; López Menchón, Héctor; Santos Blanco, M. Concepción; Rius Casals, Juan Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Conference report
      Restricted access - publisher's policy
      A numerical approach for the modelling of dipole Photoconductive Antennas (PCAs) is presented, based on the classical Drude model with extension to include the bias field screening due to both the space charge and the THz ...
    • Improvements in randomized matrix compression methods for numerical analysis of antennas and scatterers 

      López Menchón, Héctor; Heldring, Alexander; Úbeda Farré, Eduard; Rius Casals, Juan Manuel (Luis Landesa-Porras, 2023)
      Conference lecture
      Open Access
      We propose a randomized Pseudo Skeleton (or CUR) Approximation method to compress the H-matrices of linear systems that arise in the discretization of integral equations in electromagnetic scattering. This method is highly ...
    • Monte Carlo methods in electromagnetic scattering computations 

      López Menchón, Héctor; Heldring, Alexander; Úbeda Farré, Eduard; Rius Casals, Juan Manuel (Universitat Politècnica de Catalunya. Remote Sensing, Antennas, Microwaves and Superconductivity Group (CommSensLab), 2022)
      Conference report
      Open Access
      The solution of the electromagnetic scattering problem by the Method of Moments often leads to huge systems of equations that require large computational resources. In parallel computing environments, communication between ...
    • Numerical investigation of the bias-path model for the photocurrent in photoconductive antennas 

      Mas Mendoza, Sergi; López Menchón, Héctor; Santos Blanco, M. Concepción (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Conference report
      Restricted access - publisher's policy
      Numerical results on the implementation of a computationally efficient algorithm for finding the instantaneous photocurrent across the gap volume in Photoconductive antennas (PCAs) through solution of one-dimensional (1D) ...
    • Plasmonic fractal antennas 

      López Menchón, Héctor (Universitat Politècnica de Catalunya, 2016-06)
      Bachelor thesis
      Open Access
      We study the effects of using fractal shapes on the design of nanoantennas at optical geometries.
    • Simple randomized strategies for low-rank matrix compression 

      López Menchón, Héctor; Molina Burgués, Robert; Heldring, Alexander; Úbeda Farré, Eduard; Rius Casals, Juan Manuel (Universidad de Sevilla, 2023)
      Conference report
      Open Access
      We propose a randomized Pseudo Skeleton (or CUR) approximation method to compress the H-matrices of linear systems that arise in the discretization of integral equations in electromagnetic scattering. This method is ...
    • Solving electromagnetic scattering in dielectric bodies by Monte Carlo sampling 

      López Menchón, Héctor; Rius Casals, Juan Manuel; Úbeda Farré, Eduard; Heldring, Alexander (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Conference report
      Restricted access - publisher's policy
      In this work, we propose Monte Carlo sampling as a technique to avoid communication overhead in the numerical solution of complex electromagnetic scattering problems. The method is based on statistically sampling a ...