Ponències/Comunicacions de congressos
Recent Submissions
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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 ... -
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 ... -
Surface and bulk harmonic generation in the opaque region of GaAs
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2019)
Conference lecture
Restricted access - publisher's policyWe demonstrate second and third harmonic generation from a GaAs substrate, well-bellow the absorption edge, in both transmission and reflection geometries. The pump is tuned at 1064 nm, in the transparency range, while the ... -
Brightness enhancement in Non-Hermintian VCSELs
(Optical Society of American (OSA), 2019)
Conference report
Restricted access - publisher's policyVertical Cavity Surface Emitting lasers (VCSELs) are compact and efficient light sources useful for a variety of applications. However, due to lack of a transverse mode control mechanism, such lasers suffer from poor spatial ... -
Non-Hermitian broad aperture semiconductor lasers based on PT-symmetry
(2019)
Conference report
Open AccessIn this paper we propose a novel configuration to regularize the complex spatiotemporal dynamics of broad area lasers into bright light beam. It has recently been shown that arbitrary non-Hermitian optical potentials based ... -
Meta-mirrors with transverse invariance for beam shaping
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2019)
Conference report
Restricted access - publisher's policyThe paper demonstrates spatial filtering in reflection based on meta-mirrors, composed of periodic subwavelength gratings. The periodic modulation of the refraction index on the sub-micron scale exhibits optical beam shaping ... -
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 ...
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