18 citations · 39 across the 9 of their papers we have counts for
14 papers
Continuous modal spectrum in nonreciprocal cavities
Filipa R. Prudêncio, David E. Fernandes, Mário G. Silveirinha
Nonreciprocal systems enable asymmetric energy transport and suppress backscattering, giving rise to unconventional wave phenomena. Here, we show that nonreciprocal cavities based…
Bounds on the Topological Charge of Photonic Systems
F. R. Prudencio, I. Souza, M. G. Silveirinha
Topology has become a central concept in understanding physical phenomena, leading to important advances in condensed matter and photonics. Recent work has established a universal…
Superluminal Spacetime Crystals Induced by Anomalous Velocity Modulation
Filipa R. Prudêncio, Mário G. Silveirinha
Time-modulated media offer powerful opportunities for controlling light, yet extending such concepts to optical frequencies has remained challenging. Here we propose a different ro…
Topological Chiral-Gain in a Berry Dipole Material
Filipa R. Prudêncio, Mário G. Silveirinha
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 i…
Engineering Nonreciprocal Responses in Travelling-Wave Spacetime Crystals via Clausius-Mossotti Homogenization
Filipa R. Prudêncio, Mário G. Silveirinha
Here, we investigate the effective response of three-dimensional spacetime crystals formed by spherical scatterers under a travelling-wave modulation. We develop an analytical form…
Replicating Physical Motion with Minkowskian Isorefractive Spacetime Crystals
Filipa R. Prudêncio, Mário G. Silveirinha
Here, we show that isorefractive spacetime crystals with a travelling-wave modulation may mimic rigorously the response of moving material systems. While generic spacetime crystals…
Synthetic Axion Response with Spacetime Crystals
Filipa R. Prudêncio, Mário G. Silveirinha
Here, we show that spacetime modulations provide an exciting route to realize complex nonreciprocal couplings, and in particular the elusive axion response. We develop an analytica…
Ill-defined Topological Phases in Dispersive Photonic Crystals
Filipa R. Prudêncio, Mário G. Silveirinha
In recent years there has been a great interest in topological materials and in their fascinating properties. Topological band theory was initially developed for condensed matter s…
Monopole Embedded Eigenstate in Nonlocal epsilon-Near Zero Nanostructures
Filipa R. Prudêncio, Mário G. Silveirinha
In recent years, the confinement of light in open systems with no radiation leakage has raised great interest in the scientific community, both due to its peculiar and intriguing p…
First Principles Calculation of the Topological Phases of the Photonic Haldane Model
Filipa R. Prudêncio, Mário G. Silveirinha
Photonic topological materials with a broken time reversal symmetry are characterized by nontrivial topological phases, such that they do not support propagation in the bulk region…
First Principles Calculation of Topological Invariants of non-Hermitian Photonic Crystals
Filipa R. Prudêncio, Mário G. Silveirinha
The Chern topological numbers of a material platform are usually written in terms of the Berry curvature, which depends on the normal modes of the system. Here, we use a gauge inva…
Asymmetric Electron Energy Loss in Drift-Current Biased Graphene
Filipa R. Prudêncio, Mário G. Silveirinha
The electric drift current bias was recently introduced as a new paradigm to break the Lorentz reciprocity in graphene. Here, we study the impact of the nonreciprocal response in t…
Asymmetric Cherenkov Emission in a Topological Plasmonic Waveguide
Filipa R. Prudêncio, Mário G. Silveirinha
Here, we investigate the Cherenkov emission by an array of moving electric charges in the vicinity of a topologically nontrivial gyrotropic material. It is shown that the nonrecipr…
Asymmetric Band Diagrams in Photonic Crystals with a Spontaneous Nonreciprocal Response
Filipa R. Prudêncio, Sérgio A. Matos, Carlos R. Paiva
We study the propagation of electromagnetic waves in layered photonic crystals formed by materials with a spontaneous nonreciprocal response, such as Tellegen (axion) media or topo…