Bridging the THz Gap

Terahertz spectroscopy (1 THz = 1012 Hz) has emerged as a new spectroscopic technique mostly over the past two decades. This part of the electromagnetic spectra remained elusive for long since its emission and detection relies on ultra-short laser pulses. Thus, only after the invention of ultrafast LASERs it was possible to access the THz gap. Terahertz spectroscopy finds its applications in solid state physics, biology, pharmaceuticals and security screening. More elaborately Terahertz spectroscopy can be used to delve into charge carrier dynamics in semiconductors and nano materials; librational modes of water and other liquids; hydration shell around amino acids, sugars and proteins.