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.
Col·leccions
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Articles de revista [341]
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Reports de recerca [11]
Enviaments recents
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Controlling monoterpene isomerization by guiding challenging carbocation rearrangement reactions in engineered squalene-hopene cyclases
(John Wiley & sons, 2024-03-18)
Article
Accés obertThe interconversion of monoterpenes is facilitated by a complex network of carbocation rearrangement pathways. Controlling these isomerization pathways is challenging when using common Brønsted and Lewis acid catalysts, ... -
Mode-cleaning in antisymmetrically modulated non-Hermitian waveguides
(2024-01-12)
Article
Accés obertWe demonstrate all-optical spatial mode-cleaning in non-Hermitian waveguides. The effect is accounted by a unidirectional coupling among the modes resulting from a simultaneous modulation of the refractive index and the ... -
Stabilization of microlasers by non-Hermitian potentials
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2023)
Text en actes de congrés
Accés obertVertical-cavity semiconductor lasers as well as single units or arrays of Edge Emitting Lasers suffer from dynamical spatiotemporal instabilities leading to temporally unstable and low spatial beam quality. We propose a ... -
Non-Hermitian modulations for stabilization of VCSEL, EEL and EEL arrays
(2023)
Text en actes de congrés
Accés restringit per política de l'editorialSemiconductor lasers and laser arrays emit temporally unstable and low spatial quality beams associated to intrinsic dynamical spatiotemporal instabilities. W e propose the simultaneous modulations of refractive index and ... -
Stabilization of laser emission by non-Hermitian potentials
(Institute of Electrical and Electronics Engineers (IEEE), 2023)
Text en actes de congrés
Accés obertLight emission from single lasers and laser arrays can suffer from dynamical spatiotemporal instabilities leading to emitted beams temporally unstable and with low spatial quality. We propose a feasible stabilization ... -
An equivalent lattice-modified model of interfering Bragg bandgaps and Locally Resonant Stop Bands for phononic crystal made from Locally Resonant elements
(2023-08-01)
Article
Accés obertThe design and development of advanced devices based on metamaterials to control the transmission of acoustic waves is a hot topic. An important class of these metamaterials is based on phononic crystals with Locally ... -
Spatially structured optical pump for laser generation tuning
(2023-12-23)
Article
Accés obertThe goal and essential parameter of laser light conversion is achieving emitted radiation of higher brightness. For many applications, the laser beam must have the highest available beam quality and highest achievable ... -
Resonant x-ray difference frequency generation
(2023-12-28)
Article
Accés restringit per política de l'editorialResonantly enhanced x-ray difference-frequency generation (re-XDFG) is a second-order nonlinear effect that involves illuminating a molecule with two-color x-ray pulses with photon energies O1 and O2. The energy difference ... -
All-regions tunable high harmonic enhancement by a periodic static electric field
(American Institute of Physics (AIP), 2010-02-19)
Article
Accés obertSimulations show that a static electric field periodically distributed in space can be used to control the production of coherent light by high-order harmonic generation in a wide spectral range covering extremeultraviolet ... -
Permutation entropy-based characterization of speckle patterns generated by semiconductor laser light
(2023-12)
Article
Accés obertSemiconductor lasers with optical feedback are stochastic nonlinear systems that can display complex dynamics and abrupt changes when their operation conditions change. Even very small changes can lead to large variations ... -
Spectral shift and split of harmonic lines in propagation affected high harmonic generation in a long-interaction gas tube
(2023-12)
Article
Accés obertWhile generating high harmonics in long media of helium gas, at certain laser intensities and chirp, the spectral shift and split of the harmonic lines were experimentally observed, sometimes exceeding one harmonic order. ... -
Large nonlinear efficiency enhancement in the visible and UV range from plasmonic gold nanogratings
(Institute of Electrical and Electronics Engineers (IEEE), 2023)
Text en actes de congrés
Accés restringit per política de l'editorialWe report a combined experimental/theoretical investigation on second and third harmonic generation from a plasmonic gold nanograting, that exhibits a plasmonic resonance in the near IR. The intense field localization leads ...