When we refer to terahertz, we are referring to photons radiated within the terahertz (THz) region of the electromagnetic spectrum.
THz, is a unit of frequency, defined as one trillion (1012) cycles per second or 1012 hertz. The THz region lies between the microwave and infra-red regions and subsequently shares some properties with each of these. The THz region is commonly considered to encompass the frequency range of 0.1 to 3 THz.
THz photons are naturally emitted from objects with a temperature greater than 2 degrees Kelvin. SubTera’s technology is passive, which means it functions by receiving THz photons emitted from other structures.