2. Measure the amplitude and phase, or power, of the THz electromagnetic field?

As we know, electromagnetic beams are perfectly described within the framework of wave/corpuscle duality. The characteristic quantities of waves and photons in the THz domain are given in the article [E 4 062] . For optical and infrared signals, emission and detection are best understood in terms of the photon, while propagation is well modeled by wave physics. To detect THz signals, we take advantage of both aspects of light. Thermal detectors are heated by incident THz photons, while semiconductor detectors involve the excitation of free carriers by absorption of THz photons; these...