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 in this community
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Articles de revista [267]
Recent Submissions
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Translationally invariant metamirrors for spatial filtering of light beams
(American Physical Society (APS), 2020-07-01)
Article
Open AccessWe propose a translationally invariant metamirror for light filtering in reflection. The device consists of athin transverse grating in the micron scale positioned in front of a flat mirror. We analyze the performance ... -
Parametric attosecond pulse amplification far from the ionization threshold from high order harmonic generation in He+
(2020-07-31)
Article
Open AccessParametric amplification of attosecond coherent pulses around 100 eV at the single– atom level is demonstrated for the first time by using the 3D time–dependent Schrödinger equation in high–harmonic generation processes ... -
Experimental study of speckle patterns generated by low-coherence semiconductor laser light
(Institute of Physics (IOP), 2020-06-01)
Article
Restricted access - publisher's policySpeckle is a wave interference phenomenon that has been studied in various fields, including optics, hydrodynamics, and acoustics. Speckle patterns contain spectral information of the interfering waves and of the scattering ... -
Neuronal transmission of subthreshold periodic stimuli via symbolic spike patterns
(2020-05-05)
Article
Open AccessWe study how sensory neurons detect and transmit a weak external stimulus. We use the FitzHugh–Nagumo model to simulate the neuronal activity. We consider a sub-threshold stimulus, i.e., the stimulus is below the threshold ... -
Tilted black-Si: ~0.45 form-birefringence from sub-wavelength needles
(2020-05-25)
Article
Open AccessThe self-organised conical needles produced by plasma etching of silicon (Si), known as black silicon (b-Si), create a form-birefringent surface texture when etching of Si orientated at angles of ¿i¿<¿50¿-¿70° (angle between ... -
Experimental observation of flat focusing mirror based on photonic jet effect
(Nature, 2020-12-01)
Article
Open AccessIn this work, we experimentally demonstrate that a thin rectangle dielectric-metal structure can have a function of a flat focusing mirror based on photonic jet effect in reflection mode. Using polydimethylsiloxane (PDMS) ... -
Electrodynamics of conductive oxides: intensity-dependent anisotropy, reconstruction of the effective dielectric constant, and harmonic generation
(2020-05-13)
Article
Open AccessWe study electromagnetic pulse propagation in an indium tin oxide nanolayer in the linear and nonlinear regimes. We use the constitutive relations to reconstruct the effective dielectric constant of the medium, and show ... -
Stabilized narrow-beam emission from broad-area semiconductor lasers
(2020-03-20)
Article
Open AccessWe provide a feasible and compact scheme to control and stabilize the spatiotemporal dynamics of broad-area semiconductor (BAS) lasers. The proposal is based on the ability of non-Hermitian potentials with given local ... -
Regularization of broad-area lasers by non-Hermitian potentials
(2019)
Conference report
Open AccessIt was recently shown that arbitrary non-Hermitian optical potentials based on local Parity-Time (PT-) symmetry may control the flow of light, due to the asymmetric mode coupling. We propose periodic non-Hermitian potentials ... -
Remote recovery of audio signals from videos of optical speckle patterns: a comparative study of signal recovery algorithms
(2020-03-16)
Article
Open AccessOptical remote sensors are nowadays ubiquitously used, thanks to unprecedented advances in the last decade in photonics, machine learning and signal processing tools. In this work we study experimentally the remote recovery ... -
Methodology for lighting optimization applied to photocatalytic reactors
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Conference lecture
Open AccessReplacement of conventional UV-lamps used in photocatalytic reactors by UV-LED sources with lower energy consumption and larger versatility has been proposed recently; However, the implementation of these types of sources ... -
Optically-thin broadband graphene-membrane photodetector
(2020-03-01)
Article
Open AccessA broadband graphene-on-Si3N4-membrane photodetector for the visible-IR spectral range is realised by simple lithography and deposition techniques. Photo-current is produced upon illumination due to presence of the build-in ...
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