75 citations · 153 across the 9 of their papers we have counts for
9 papers
A Generative deep learning approach for shape recognition of arbitrary objects from phaseless acoustic scattering data
W. W. Ahmed, M. Farhat, P. -Y. Chen +2
We propose and demonstrate a generative deep learning approach for the shape recognition of an arbitrary object from its acoustic scattering properties. The strategy exploits deep…
Machine learning for knowledge acquisition and accelerated inverse-design for non-Hermitian systems
W. W. Ahmed, M. Farhat, K. Staliunas +2
Non-Hermitian systems offer new platforms for unusual physical properties that can be flexibly manipulated by redistribution of the real and imaginary parts of refractive indices,…
Deterministic and probabilistic deep learning models for inverse design of broadband acoustic cloak
Waqas W. Ahmed, Mohamed Farhat, Xiangliang Zhang +1
Concealing an object from incoming waves (light and/or sound) remained science fiction for a long time due to the absence of wave-shielding materials in nature. Yet, the invention…
Genetic optimization Invents non-Hermitian potentials for Asymmetric Reflectivity
W. W. Ahmed, R. Herrero, M. Botey +2
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-…
Restricted Hilbert transform for non-Hermitian management of fields
W. W. Ahmed, R. Herrero, M. Botey +2
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…
Regularization of Vertical-Cavity Surface-Emitting Lasers emission by periodic non-Hermitian potentials
W. W. Ahmed, R. Herrero, M. Botey +2
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-…
Stabilization of Broad Area Semiconductor Laser sources by simultaneous index and pump modulations
W. W. Ahmed, S. Kumar, J. Medina +3
We show that the emission of broad area semiconductor amplifiers and lasers can be efficiently stabilized by introducing, two-dimensional periodic modulations simultaneously on bot…
Spatiotemporal stabilization proof of concept of Broad Area Semiconductor laser sources
J. Medina, W. W. Ahmed, S. Kumar +3
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 modulat…
Directionality Fields generated by a Local Hilbert Transform
W. W. Ahmed, R. Herrero, M. Botey +3
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…