132 citations · 1.1k across the 51 of their papers we have counts for
6 papers · 2 filters
Restoring of optical resonances in subwavelength hyperbolic etalons
Alessandro Ciattoni, Elisa Spinozzi
We give a solution to the fundamental problem of restoring optical resonances in deep subwavelength structures by resorting to indefinite metamaterials. We prove that a nanometric…
Singularity-driven Second and Third Harmonic Generation in a ε-near-zero nanolayer
M. A. Vincenti, D. de Ceglia, A. Ciattoni +1
We show a new path to ε~0 materials without resorting to metal-based metamaterial composites. A medium that can be modeled using Lorentz oscillators usually displays ε=0 crossing p…
Ultrathin optical switch based on a liquid crystal/silver nanoparticles mixture as a tunable indefinite medium
Elisa Spinozzi, Alessandro Ciattoni
We predict that a liquid crystal/silver nanoparticles mixture can be designed so that, in a frequency range, its effective ordinary and extraordinary permittivities have real parts…
Gain assisted nanocomposite multilayers with near zero permittivity modulus at visible frequencies
Carlo Rizza, Andrea Di Falco, Alessandro Ciattoni
We have fabricated a layered nano-composite by alternating metal and gain medium layers, the gain dielectric consisting of a polymer incorporating optically pumped dye molecules. E…
Highly efficient second-harmonic generation from indefinite epsilon-near-zero slabs of subwavelength thickness
Alessandro Ciattoni
We theoretically predict efficient optical second-harmonic generation (SHG) from a few hundred nanometer thick slab consisting of a quadratic nonlinear anisotropic medium whose lin…
All-optical active plasmonic devices with memory and power switching functionalities based on epsilon-near-zero nonlinear metamaterials
Alessandro Ciattoni, Carlo Rizza, Elia Palange
All-optical active plasmonic devices are of fundamental importance for designing efficient nanophotonic circuits. We theoretically propose and numerically investigate an active pla…