The terahertz range refers to electromagnetic waves with frequencies between 100 GHz and 10 THz, or wavelengths between 3 mm and 30 μm. Light between radio waves and infrared has some unique properties. Terahertz can “look inside” plastics and textiles, paper and cardboard.

How do you make terahertz frequency?

Broadband terahertz pulses can be generated by exciting THz-PCAs with a femto-second short pulse laser. Using a femto-second laser with ~ 100 fs optical pulse duration, terahertz pulses with their frequency content extended up to around 5 THz and an average power of a few μW can be achieved.

What is the meaning of terahertz?

: a unit of frequency equal to one trillion hertz Visible light occupies the neighborhood of 300 terahertz, which is 300 x 1012 cycles per second.