Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Fernandes, David E."'
We study plasmonic time crystals, which constitute an extension of the dielectric-based photonic time crystals to plasmonic media. A salient feature of plasmonic time crystals is their ability to support amplification of both longitudinal and transve
Externí odkaz:
http://arxiv.org/abs/2407.19958
Here, we present an exploratory study of the potential applications of electrically biased materials that possess a nonreciprocal and non-Hermitian electromagnetic response analogous to the electronic response of field-effect transistors. The most di
Externí odkaz:
http://arxiv.org/abs/2405.15606
Motivated by our recent findings in [Phys. Rev. Lett. 128, 013902, 2022], which introduces a new class of electromagnetic bulk materials whose response is similar to conventional semiconductor transistors, here we propose a one-dimensional (1D) versi
Externí odkaz:
http://arxiv.org/abs/2402.03320
Autor:
Morgado, Tiago A., João, Guilherme L., Pereira, Ricardo A. M., Fernandes, David E., Lannebère, Sylvain
We experimentally verify that a magnetic uniaxial wire medium lens consisting of a racemic array of helical-shaped metallic wires may enable channeling the normal component of the magnetic field of near-field sources with resolution well below the di
Externí odkaz:
http://arxiv.org/abs/2306.09208
In this work, we develop a homogenization model to determine the effective response of a metallic nanowire array embedded in an electric gyrotropic material. We study the interaction of electromagnetic waves with the metamaterial and demonstrate that
Externí odkaz:
http://arxiv.org/abs/2305.15158
Autor:
Fernandes, David E.
In this article we develop an effective medium model to characterize the electron wave propagation in graphene based nanostructures with an electrostatic and magnetic vector potentials imposed on their surface. We use a numerical algorithm to determi
Externí odkaz:
http://arxiv.org/abs/2301.02480
Here, inspired by the operation of conventional semiconductor transistors, we introduce a novel class of bulk materials with nonreciprocal and non-Hermitian electromagnetic response. Our analysis shows that material nonlinearities combined with a sta
Externí odkaz:
http://arxiv.org/abs/2201.02118
Autor:
Fernandes, David E., Pereira, Ricardo A. M., Lannebère, Sylvain, Morgado, Tiago A., Silveirinha, Mário G.
In this article, it is experimentally verified that nonreciprocal photonic systems with a continuous translation symmetry may have an ill-defined topology. The topological classification of such systems is only feasible when the material response is
Externí odkaz:
http://arxiv.org/abs/2112.13658
We study the role of time-reversal symmetry on the dynamical response of nonlinear optical systems that behave as unidirectional ("one-way") devices. It is shown that lossless nonlinear materials, despite being nonreciprocal, are typically time-rever
Externí odkaz:
http://arxiv.org/abs/2111.07659
The topology of typical Chern insulators is rooted in the periodicity of the system along two directions of real-space. In this article, we depart from this standard concept and demonstrate that a generic non-Hermitian photonic waveguide periodic alo
Externí odkaz:
http://arxiv.org/abs/1912.11271