Ponències/Comunicacions de congressos
Recent Submissions
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Non-Hermitian Light Management Based on Local Hilbert Transform
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Conference report
Restricted access - publisher's policyLight patterns; Metamaterials; Non-Hermitian optics; Microlasers -
Phase locked harmonic generation in the opaque region of GaAs
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Conference report
Open AccessWe demonstrate second and third harmonic generation from a GaAs substrate, well-below the absorption edge, in both transmission and reflection geometries. The pump is tuned at 1064 nm, in the transparency range, while the ... -
Structured Meta-Mirrors for Beam Spatial Filtering
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Conference report
Open AccessThe work presents optical spatial filtering in reflection based on translationally invariant meta-mirrors. The meta-structure is generated by a thin grating presenting a transverse modulation of the refraction index on the ... -
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 ... -
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 ... -
Stabilization of Broad Area Semiconductor Amplifiers and Lasers by Double Modulation of Pump and Refractive Index
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Conference report
Restricted access - publisher's policyBroad Area Semiconductor Amplifiers and Lasers display instability of the homogeneous state typically related with self-focusing nonlinearities, inducing multi-transverse mode operation and filamentation that deteriorates ... -
Dissipation Induced Modulation Instability: New Applications for Frequency Combs and Pulses Generation
(Institute of Electrical and Electronics Engineers (IEEE), 2018-11-15)
Conference report
Restricted access - publisher's policyWe present a new technique based on a dissipation induced modulation instability, caused by unbalanced spectral dissipation for signal and idler waves, with applications in amplifiers and parametric oscillators but especially ... -
Phononic crystal device as a self-collimator for laser induced ultrasound
(Sociedad Española de Acústica (SEA), 2018)
Conference report
Restricted access - publisher's policyLaser 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)
Conference report
Open AccessAligned 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)
Conference report
Restricted access - publisher's policyWe 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)
Conference report
Open AccessWe 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)
Conference report
Open AccessOptical 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 ...
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