Leonardo Viti

TL;DR: The first technological demonstration of a phosphorus-based active active terahertz device is described, exploiting a 10 nm thick flake of exfoliated crystalline black phosphorus as an active channel of a field-effect transistor.

TL;DR: In this paper, the authors demonstrate ultrabroadband time-resolved terahertz spectroscopy on a single InAs nanowire with 10nm spatial resolution and sub-100 fs time resolution.

TL;DR: It is demonstrated that semiconductor nanowires can also be used as building blocks for the realization of high-sensitivity terahertz detectors based on a 1D field-effect transistor configuration.

TL;DR: Black phosphorus is introduced as a promising new material in surface polaritonics that features key advantages for ultrafast switching, the excellent switching contrast and switching speed, the coherence properties and the constant wavelength of this transient mode make it a promising candidate for ultra fast nanophotonic devices.

TL;DR: A novel detector for terahertz radiation that exploits the photothermoelectric (PTE) effect is introduced, based on a design that employs a dual-gated, dipolar antenna with a gap of ∼100 nm and a solid understanding of how the PTE effect gives rise to a THz-induced photoresponse is reached.