Ponències/Comunicacions de congressos
Enviaments recents
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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 ... -
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 ... -
Self-cleaning in non-Hermitian linear multimode fibers
(Institute of Electrical and Electronics Engineers (IEEE), 2023)
Text en actes de congrés
Accés obertWe propose a self-cleaning mechanism in linear non-Hermitian graded index multimode fibers. The proposal is based a unidirectional coupling among transverse modes, induced by the introduction of a non-Hermitian potential, ... -
Non-Hermitian light control in periodically modulated multimode fibers
(2023)
Text en actes de congrés
Accés restringit per política de l'editorialWe propose a new light management mechanism in graded index (GRIN) multimode fibers (MMFs) that allow to control the spectral mode distribution of the propagated beam. The effect is achieved through longitudinal non-Hermitian ... -
Light control by scattering cancellation in ordered and disordered non-Hermitian media, direct and inverse design
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2023)
Text en actes de congrés
Accés obertNon-Hermitian Physics has emerged as a fertile ground for a smart control of waves. Here, we present direct and inverse-design strategies to achieve ‘on demand’ dynamical manipulation of light by non-Hermitian potentials. ... -
Rotating acoustic drills by the interference of detuned vortices
(Institute of Electrical and Electronics Engineers (IEEE), 2022)
Text en actes de congrés
Accés restringit per política de l'editorialWe present acoustic drill beams, structured sound beams exhibiting a dynamic intensity distribution that matches the shape of a helix. The intensity distribution rotates along the beam axis with controlled direction and ... -
Fano-like resonances in modulated single-layers for angular and frequency selectivity of light
(2022)
Text en actes de congrés
Accés restringit per política de l'editorialThis study was aimed to investigate the growth process of thin films on a pre-structured surface using different optically transparent materials and their optical properties. As results of conformal deposition of ion beam ... -
Photonic crystals for suppression of filamentation
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2022)
Text en actes de congrés
Accés restringit per política de l'editorialIn this work we show the prospect of using periodic refractive index modulation – photonic crystals – to control the spatial dispersion curvature in a way that could potentially counteract the Kerr effect, thus suppressing ... -
Dynamic higher-order Bessel-Gauss beam interference generation of rotating beams
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2022)
Text en actes de congrés
Accés restringit per política de l'editorialOne of the key trends in laser material processing is the usage of structured laser beams. One such example is the Bessel beam with an elongated focal area and self-healing properties. Higher-order Bessel beams can be ... -
Spatial filter realized by dielectrice waveguides
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2022)
Text en actes de congrés
Accés restringit per política de l'editorialIn this work, we introduce a spatial filtering mechanism that can be effectively utilized by photonic crystals. The phenomenon utterly expressed here is Rayleigh-Wood’s anomaly. Such a mechanism is realized and optimized ...
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