6 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…
Roadmap on Nonlocality in Photonic Materials and Metamaterials
Francesco Monticone, N. Asger Mortensen, Antonio I. Fernández-DomÃnguez +63
Photonic technologies continue to drive the quest for new optical materials with unprecedented responses. A major frontier in this field is the exploration of nonlocal (spatially d…
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…