Patent ID: 8143566

Claim:
An electric device operable with a THz-range frequency of a device output, the electric device comprising: an electrodes' arrangement comprising at least a photocathode electrode and an associated anode electrode with a free space between them where the photocathode electrode is exposed to illumination of a predetermined wavelength range thereby creating electrons' emission from the photocathode electrode and a photocurrent through the electric device; a voltage supply unit for supplying an input electrical signal onto one electrode of said electrodes' arrangement, an output electrical signal indicative of the photocurrent being readable on at least the one electrode of said electrodes' arrangement; and a signal transmitter/receiver comprising an antenna circuit electrically connected to the at least the one electrode at which the output electrical signal is read to thereby radiate an output signal of the electric device in the THz-range in response to the output electrical signal on the at least the one electrode of the electrodes' arrangement.