Terahertz Spectroscopy


The advantages of the THz-spectroscopy consist of the possibility for nondestructive materials identification and characterization. Thus, allowing application in interdisciplinary areas of the human, health and social science as security, environmental inspection, detection, protection, spectroscopic imaging, biomedical analysis, space communications, tomography imaging, label-free genetic analysis, and chemical/biological sensing and more. The large potential of the method for sensing and identification of chemicals is based on the fact that almost all molecules show spectral characteristics in the THz-region, related to H-bond deformations, skeletal modes, and/or lattice vibrations. The THz region of the electromagnetic spectrum is of great scientific fundamental interest, related the observed linear optical and nonlinear optical phenomena as well.

Sensing science and technology of explosives and related compounds (ERCs) are crucial for homeland security and defense related applications. A wide variety of detection methods are involved in explosive detection including X-rays, infrared, THz, microwave, gamma-rays, etc. The field of terahertz (THz) spectroscopy has been investigated many times over previous years as a technique for the detection of explosive vapour signatures. THz waves can penetrate through many dielectric materials, such as clothing, pa- per, plastics, leather, wood and ceramics. In addition, THz radiation has low photon energies and will not cause harmful photoionization in biological tissues. Owing to these advantages, THz technology is a competitive method for inspecting explosives carried by a person or concealed in packages. Terahertz radiation lies in the far infrared region—from 0.1 to 10 THz. Most explosives and explosive related compounds have spectral fingerprints within this range and, as many apparatus operate within the range 0.1–5.0 THz.

Genia Photonics specializes in technologies that can generate THz signal. Genia Photonics synchronized laser system provides a solution to generate THz frequencies. As the internal lasers outputs are synchronized, that beam is then sent through a THz crystal in order to generate THz frequencies corresponding to the targeted wavenumbers.