69 citations · 217 across the 10 of their papers we have counts for
9 papers · 1 filter
Spin-controlled photonics via temporal anisotropy
Carlo Rizza, Giuseppe Castaldi, Vincenzo Galdi
Temporal metamaterials, based on time-varying constitutive properties, offer new exciting possibilities for advanced field manipulations. In this study, we explore the capabilities…
Efficient vortex generation in sub-wavelength epsilon-near-zero slabs
Alessandro Ciattoni, Andrea Marini, Carlo Rizza
We show that a homogeneous and isotropic slab, illuminated by a circularly polarized beam with no topological charge, produces vortices of order two in the opposite circularly pola…
Nonlocal homogenization theory in metamaterials: effective electromagnetic spatial dispersion and artificial chirality
Alessandro Ciattoni, Carlo Rizza
We develop, from first principles, a general and compact formalism for predicting the electromagnetic response of a metamaterial with non-magnetic inclusions in the long wavelength…
Observation of electro-activated localized structures in broad area VCSELs
J. Parravicini, M. Brambilla, L. Columbo +5
We demonstrate experimentally the electro-activation of a localized optical structure in a coherently driven broad-area vertical-cavity surface-emitting laser (VCSEL) operated belo…
Reconfigurable photoinduced metamaterials in the microwave regime
Carlo Rizza, Alessandro Ciattoni, Francesco De Paulis +4
We investigate optically reconfigurable dielectric metamaterials at gigahertz frequencies. More precisely, we study the microwave response of a subwavelength grating optically impr…
Harnessing quadratic optical response of two-dimensional materials through active microcavities
Alessandro Ciattoni, Carlo Rizza
We propose a method for efficiently harnessing the quadratic optical response of two-dimensional graphene-like materials by theoretically investigating second harmonic generation f…