Cerca
Ara es mostren els items 1-10 de 83
Spatial filtering in broad area semiconductor laser using photonic crystal
(2020)
Comunicació de congrés.
Accés restringit per política de l'editorial
Comunicació de congrés.
Accés restringit per política de l'editorial
In high power regimes, broad area semiconductor lasers usually suffer from poor beam quality due to their asymmetric beam divergence, large beam quality factor (M2) and from the absence of any intrinsic filtering mechanism ...
Stabilization of Broad Area Semiconductor Amplifiers and Lasers by Double Modulation of Pump and Refractive Index
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Text en actes de congrés.
Accés restringit per política de l'editorial
Text en actes de congrés.
Accés restringit per política de l'editorial
Broad 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 ...
Asymmetric transmission from a 2D PT-symmetric honeycomb nanostructure
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Comunicació de congrés.
Accés restringit per política de l'editorial
Comunicació de congrés.
Accés restringit per política de l'editorial
We propose a simple realization of a 2-dimensonal (2D) PT-symmetric photonic structure: a honeycomb arrangement of alternating cylinders with gain or loss in a dielectric background. The structure provides a periodic ...
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'editorial
Text en actes de congrés.
Accés restringit per política de l'editorial
In 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 ...
Non-Hermitian broad aperture semiconductor lasers based on PT-symmetry
(2019)
Text en actes de congrés.
Accés obert
Text en actes de congrés.
Accés obert
In 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 ...
Inverse-design of non-Hermitian potentials for light management
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2022)
Text en actes de congrés.
Accés obert
Text en actes de congrés.
Accés obert
In this paper, we propose a general inverse-design strategy based on genetic algorithm optimization to achieve ‘on demand’ manipulation of light in one-dimensional (1D) and two-dimensional (2D) non-Hermitian systems. The ...
Field concentration by Axisymmetric local PT-symmetry
(2016)
Text en actes de congrés.
Accés obert
Text en actes de congrés.
Accés obert
We propose a new class of systems holding PT-symmetry only locally; the potential fulfills: U(r-r0)=U*(-r+r0 ) in a small neighborhood of any point r0, whereas on a global scale the system is only Parity symmetric: ...
Stabilization of Broad Area Semiconductor Laser Sources
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Text en actes de congrés.
Accés obert
Text en actes de congrés.
Accés obert
We 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 ...
Modes in microchip lasers
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2022)
Text en actes de congrés.
Accés restringit per política de l'editorial
Text en actes de congrés.
Accés restringit per política de l'editorial
The transverse modes in microchip lasers (MCL) appear different from the classical mode theory, as the resonator consists of a set of plane mirrors (similar to semiconductor edge-emitting lasers and VCSELs). Then the ...
Direct- and Inverse-design for non-Hermitian smart light management
(META Conference, 2022)
Text en actes de congrés.
Accés obert
Text en actes de congrés.
Accés obert
We present direct and inverse-design strategies to achieve ‘on demand’ dynamical manipulation of
light by non-Hermitian potentials. The direct approach, based on a generalized Hilbert Transform, widens the
concept of the ...