DONLL - Dinàmica no lineal, òptica no lineal i làsers
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.
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.
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.
Collections
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Articles de revista [240]
Recent Submissions
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Regularization of vertical-cavity surface-emitting laser emission by periodic non-Hermitian potentials
(2019-08-15)
Article
Restricted access - publisher's policyWe 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
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2019)
Conference lecture
Restricted access - publisher's policyWe 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
(Public Library of Science (PLOS), 2019-01-01)
Article
Open AccessRetinal 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
(2019-08-29)
Article
Open AccessPhase-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
(2019-06-01)
Article
Open AccessOptically 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
(2019-04-06)
Article
Restricted access - publisher's policyIt 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
(2018-03-17)
Article
Open AccessA 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 ... -
Angular filtering by Bragg photonic microstructures fabricated by physical vapour deposition
(2019-07-01)
Article
Restricted access - publisher's policyWe propose and experimentally demonstrate spatial filtering by photonic crystals in a Bragg configuration. Compared to the Laue configuration, where spatial filtering was already demonstrated before, the Bragg configuration ... -
Uncovering temporal regularity in atmospheric dynamics through Hilbert phase analysis
(Institute of Physics (IOP), 2019-05-03)
Article
Open AccessUncovering meaningful regularities in complex oscillatory signals is a challenging problem with applications across a wide range of disciplines.Here, we present a novel approach, based on the Hilbert transform (HT).We show ... -
Topological data analysis of high resolution diabetic retinopathy images
(Public Library of Science (PLOS), 2019-05-24)
Article
Open AccessDiabetic retinopathy is a complication of diabetes that produces changes in the blood vessel structure in the retina, which can cause severe vision problems and even blindness. In this paper, we demonstrate that by identifying ... -
Fully Noncontact Hybrid NDT for 3D Defect Reconstruction Using SAFT Algorithm and 2D Apodization Window
(Multidisciplinary Digital Publishing Institute (MDPI), 2019-05-08)
Article
Open AccessNondestructive testing of metallic objects that may contain embedded defects of different sizes is an important application in many industrial branches for quality control. Most of these techniques allow defect detection ... -
Stabilization of Broad Area Semiconductor Laser Sources
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Conference report
Open AccessWe numerically proof the stabilization of broad area semiconductor laser sources by introducing simultaneous in-phase two-dimensional modulations on the refractive index and on the pump (gain). We also examine the interplay ...
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