Figure 1
From: THz-photonics transceivers by all-dielectric phonon-polariton nonlinear nanoantennas
The wavelength converter: the information message, with power \(P_i\), mixes with the incident signal, power \(P_s\), both in the IR region. DFG in the all–dielectric nanoantennas emitting the THz information signal, \(THz_i\), to produce a THz surface wave (SW) which propagates in the surrounding THz metasurface where it is converted into the desired THz radiation in the far-field (FF). The FF plot is created by using COMSOL Multiphysics v5.5—https://www.comsol.com.
