THz-photonics transceivers by all-dielectric phonon-polariton nonlinear nanoantennas
Unai Arregui Leon, Davide Rocco, Luca Carletti, Marco Peccianti, S. Maci, Giuseppe Della Valle, Costantino De Angelis
Abstract
The THz spectrum (spanning from 0.3 to 30 THz) offers the potential of a plethora of applications, ranging from the imaging through non transparent media to wireless-over-fiber communications and THz-photonics. The latter framework would greatly benefit from the development of optical-to-THz wavelength converters. Exploiting Difference Frequency Generation in a nonlinear all dielectric nanoantenna, we propose a compact solution to this problem. By means of a near-infrared pump beam (at [Formula: see text]), the information signal in the optical domain (at [Formula: see text]) is converted to the THz band (at [Formula: see text]). The approach is completely transparent with respect to the modulation format, and can be easily integrated in a metasurface platform for simultaneous frequency and spatial moulding of THz beams.