Zobrazeno 1 - 10
of 485
pro vyhledávání: '"Silveirinha, Mário G."'
Recent studies have shown that non-equilibrium optical systems under static electric fields offer a pathway to realize chiral gain, where the non-Hermitian response of a material is controlled by the spin angular momentum of the wave. In this work, w
Externí odkaz:
http://arxiv.org/abs/2411.07766
Autor:
Serra, João C., Silveirinha, Mário G.
Conventional Chern insulators are two-dimensional periodic structures that support unidirectional edge states at the boundary, while the wave propagation in the bulk regions is forbidden. The number of unidirectional edge states is governed by the ga
Externí odkaz:
http://arxiv.org/abs/2410.09906
Conventional optical materials are characterized by either a dissipative response, which results in polarization-independent absorption, or by a gain response that leads to wave amplification. In this study, we explore the potential of a peculiar cla
Externí odkaz:
http://arxiv.org/abs/2410.08962
Publikováno v:
Comptes Rendus. Physique, Vol 21, Iss 4-5, Pp 367-388 (2020)
Here, we present an overview of a first principles homogenization theory of periodic metamaterials. It is shown that in a rather general context it is possible to formally introduce effective parameters that describe the time evolution of macroscopic
Externí odkaz:
https://doaj.org/article/e23dc5588b0449c39c88c84023c2951b
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 investigate the effective response of three-dimensional spacetime crystals formed by spherical scatterers under a travelling-wave modulation. We develop an analytical formalism to homogenize the spacetime crystals that extends the renowned C
Externí odkaz:
http://arxiv.org/abs/2407.03996
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
We investigate the frictional force arising from quantum fluctuations when two dissipative metallic plates are set in a shear motion. While early studies showed that the electromagnetic fields in the quantum friction setup reach nonequilibrium steady
Externí odkaz:
http://arxiv.org/abs/2402.09074
Autor:
Serra, João C., Galiffi, Emanuele, Huidobro, Paloma A., Pendry, John B., Silveirinha, Mário G.
Photonic systems with time-varying modulations have attracted considerable attention as they allow for the design of non-reciprocal devices without the need for an external magnetic bias. Unlike time-invariant systems, such modulations couple modes w
Externí odkaz:
http://arxiv.org/abs/2402.08507
Autor:
Morgado, Tiago A., Rappoport, Tatiana G., Tsirkin, Stepan S., Lannebère, Sylvain, Souza, Ivo, Silveirinha, Mário G.
Here, we present an in-depth theoretical analysis of the linear electrooptic effect in low-symmetry three-dimensional (3D) conductive materials with large Berry curvature dipoles. Our study identifies two distinct kinetic contributions to the linear
Externí odkaz:
http://arxiv.org/abs/2401.13764