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 waves pass through a variety of amorphous substances – many synthetics and textiles, but also paper and cardboard are transparent to terahertz waves.
“Many bio-molecules, proteins, explosives or narcotics also feature characteristic absorption lines, so-called spectral “fingerprints”, at frequencies between 0.1 and 2 THz. The two main advantages of terahertz radiation are thus the penetration of conventionally opaque materials on one hand, and a high chemical selectivity on the other hand”.
That was the report submitted for terahertz radiation technology that could make all hidden materials visible to everyone. This new graphene-based light detector uses a higher kind of wavelength that could detect hidden objects that are invisible to the human eyes. The Center for Nanophysics and Advanced Materials reveals that the terahertz radiation is based between microwave and infrared frequencies on the electromagnetic spectrum, and manufacturers could utilize the technology to manufacture sensor equipment that could do wonders today.
The Center for Nanophysics and Advanced Materials further states that they “have discovered a way to control magnetic properties of graphene that could lead to powerful new applications in magnetic storage and magnetic random access memory.” And this is based largely on the fact that the graphene carbon sheet has amazing physical and electronic properties, and these could be developed to absorb electromagnetic frequencies that is suitable for terahertz detectors.