Ponències/Comunicacions de congressos
Enviaments recents
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Phononic crystal device as a self-collimator for laser induced ultrasound
(Sociedad Española de Acústica (SEA), 2018)
Text en actes de congrés
Accés restringit per política de l'editorialLaser generated ultrasound has gained interest as an alternative source of ultrasound thanks to its remote operation, high resolution in the excitation area and broad frequency band. However, one of its drawbacks is the ... -
Material defect reconstruction by non-destructive testing with laser induced ultrasonics
(Institute of Physics (IOP), 2018)
Text en actes de congrés
Accés obertAligned with current research efforts and industrial applications on nondestructive testing, in this work, a hybrid system combining remotely induced laser ultrasonics with conventional transducer detection is studied for ... -
Management of Light Patterns Based on Local Hilbert Transform
(2018)
Text en actes de congrés
Accés restringit per política de l'editorialWe propose a new approach of optical field management based on a local Hilbert transform, where the non-Hermitian potentials generating arbitrary vector fields of directionality p(\vec r), with desired shapes and topologies ... -
Self-collimation in 2D Complex P- and PT-symmetric systems
(2017)
Text en actes de congrés
Accés obertWe predict the self-collimation phenomena (or equivalently, dynamical localization) in 2-dimensional P-symmetric and PT-symmetric complex potentials, with periodic modulations of both gain/loss and refractive index. ... -
PT-axisymmetry for extraordinary field confinement
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2017)
Text en actes de congrés
Accés obertOptical Parity-Time (PT-) symmetric systems support unusual properties when the symmetric coupling between internal modes is broken. We propose a new class of quasiperiodic PT-axisymmetric systems which lead to a simultaneous ... -
Self-collimated beams in 2D complex periodic lattices from P- to PT-symmetry
(2017)
Text en actes de congrés
Accés obertWe analyze self-collimation in two-dimensional periodic complex lattices. We consider P-symmetric and PT-symmetric complex lattices with different geometries, where the periodic modulations of both refractive index and ... -
PT-axisymmetric VCSELs with linear central defect
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Text en actes de congrés
Accés obertSemiconductor Lasers and particularly Vertical-Cavity Surface-Emitting Lasers (VCSELs) are important laser sources used for many purposes. However, the applications of these lasers are mainly restricted by their strongly ... -
Vertical Azimuth Display simulator for wind-Doppler lidar error assessment
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Text en actes de congrés
Accés obertThis works presents a simplified Vertical Azimuth Display (VAD) motion simulator for off-shore wind lidars. The simulator is rooted to the case of a conically-scanning lidar (e.g., the Zephyr lidar), where the wind speed ... -
Stabilization of broad area semiconductor lasers
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2018)
Text en actes de congrés
Accés restringit per política de l'editorialBroad Area Semiconductor edge-emitting lasers typically display self-focusing nonlinearity due to the refractive index dependence on the population inversion. It induces the homogeneous solution instability, multi-transverse ... -
Polarization-independent broadband bidirectional optical cloaking using a new type of inverse scattering approach
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Text en actes de congrés
Accés obertSince the advent of transformation optics a decade ago [1], the ability to achieve optical cloaking has become a matter of practical realization. However, so far extreme material requirements and large device areas have ... -
Are the spikes emitted by a semiconductor laser with feedback similar to neuronal spikes?
(2017)
Text en actes de congrés
Accés restringit per política de l'editorialWe study experimentally a semiconductor laser operating in a feedback-induced regime known as low frequency fluctuations (LFFs), in which the laser emits a spiking output that resembles the spikes of biological neurons. ... -
A wind-lidar buoy for offshore wind measurements: first commissioning test-phase results
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Comunicació de congrés
Accés restringit per política de l'editorialThis paper presents the development of a new commercial floating lidar system aimed to measure the wind resource and other environmental variables at candidate wind farm locations. This work describes this new lidar system ...
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