Zobrazeno 1 - 10
of 452
pro vyhledávání: '"Botey, M."'
We show that the simultaneous modulation of the propagation constant and of the gain/loss coefficient along the multimode fibers results in unidirectional coupling among the modes, which, depending on the modulation parameters, leads to the enhanceme
Externí odkaz:
http://arxiv.org/abs/2211.12762
We propose and explore a physical mechanism for the stabilization of the complex spatiotemporal dynamics in arrays (bars) of broad area laser diodes taking advantage of the symmetry breaking in non-Hermitian potentials. We show that such stabilizatio
Externí odkaz:
http://arxiv.org/abs/2106.08763
We propose a general design strategy based on genetic optimization to realize asymmetric reflectivity in periodic and non-periodic planar structures containing dielectric and gain-loss layers. By means of an optimization algorithm, it is possible to
Externí odkaz:
http://arxiv.org/abs/2008.12057
Publikováno v:
Phys. Rev. Applied 14, 044010 (2020)
Non-Hermitian systems exploiting the synergy between gain and loss have recently become the focus of interest to discover novel physical phenomena. The spatial symmetry breaking in such systems allows tailoring the wave propagation at will. Inspired
Externí odkaz:
http://arxiv.org/abs/2002.01817
We propose a novel physical mechanism based on periodic non-Hermitian potentials to efficiently control the complex spatial dynamics of broad-area lasers, particularly in Vertical-Cavity Surface-Emitting Lasers (VCSELs), achieving a stable emission o
Externí odkaz:
http://arxiv.org/abs/1902.04915
We provide a numerical proof of concept of a stabilization mechanism for BAS laser sources. The scheme is based on the simultaneous introduction of in-phase two-dimensional modulations on the refractive index and pump (gain). We numerically proof tot
Externí odkaz:
http://arxiv.org/abs/1802.06256
We show that the emission of broad area semiconductor amplifiers and lasers can be efficiently stabilized by introducing, two-dimensional periodic modulations simultaneously on both the refractive index and the pump (gain-loss) profiles, in the trans
Externí odkaz:
http://arxiv.org/abs/1801.03878
Publikováno v:
Phys. Rev. A 97, 033824 (2018)
We propose a new approach based on a local Hilbert transform to design non-Hermitian potentials generating arbitrary vector fields of directionality, p(r), with desired shapes and topologies. We derive a local Hilbert transform to systematically buil
Externí odkaz:
http://arxiv.org/abs/1707.04556
Publikováno v:
Sci. Rep. 5, 13268 (2015)
Spontaneous pattern formation in a variety of spatially extended nonlinear system always occurs through a modulation instability: homogeneous state of the system becomes unstable with respect to growing modulation modes. Therefore, the manipulation o
Externí odkaz:
http://arxiv.org/abs/1504.00236
Publikováno v:
In Technological Forecasting & Social Change December 2020 161
