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Terahertz optically tunable dielectric metamaterials without microfabrication
Carlo Rizza, Alessandro Ciattoni, Lorenzo Columbo +2
We theoretically investigate the terahertz dielectric response of a semiconductor slab hosting an infrared photoinduced grating. The periodic structure is due to the charge carries…
Diffractionless propagation through Kapitza stratified media
Carlo Rizza, Alessandro Ciattoni
We show that in the presence of a rapidly modulated dielectric permittivity with a large modulation depth (Kapitza medium) a novel and robust regime of diffractionless electromagne…
Terahertz active spatial filtering through optically tunable hyperbolic metamaterials
Carlo Rizza, Alessandro Ciattoni, Elisa Spinozzi +1
We theoretically consider infrared-driven hyperbolic metamaterials able to spatially filtering terahertz radiation. The metamaterial is a slab made of alternating semiconductor and…