What is Terahertz ?

What is Terahertz ?

Terahertz (THz) refers to the electromagnetic waves or radiation that fall within the frequency range of 1 to 10 trillion cycles per second, which corresponds to wavelengths ranging from approximately 0.03 millimeters to 3 millimeters. The terahertz frequency range is situated between microwaves and infrared radiation in the electromagnetic spectrum.

Terahertz waves have unique properties that make them useful in various scientific and technological applications. They can pass through many non-conductive materials, such as clothing, paper, and plastics, without causing damage, while also providing valuable spectroscopic information about the composition and structure of these materials. This makes terahertz radiation suitable for imaging, sensing, and non-destructive testing purposes.

Additionally, terahertz waves have been explored for their potential in communication systems, as they offer the possibility of high-speed data transfer rates due to their large available bandwidth. However, their use in practical communication applications is still under development.

It’s worth noting that terahertz technology is an active area of research, and scientists and engineers continue to explore its potential in fields like medical imaging, security screening, materials characterization, and more.

What is Terahertz ?

What is Terahertz ?

New advances in different technologies have made the previously unused terahertz frequency band accessible for imaging systems. The ‘terahertz gap’ has a frequency ranges from ∼0.3 THz to ∼10 THz in the electromagnetic spectrum which in between microwave and infrared.

The terahertz radiation waves are invisible to naked eye & in comparison with X-ray they are intrinsically safe, non-destructive and non-invasive. This is such a new field that researchers around the world race to build the first practical system. It resolves many of the questions left unanswered by complementary techniques, such as optical imaging, Raman and infrared.

Terahertz spectroscopy has number of applications run from detecting defects in tablet coating, product inspection (industry), spectroscopy (chemistry, astronomy), material characterization (physics), weapons concealed under clothing (airports), detection of cancer and caries. In the pharmaceutical industries it enables nondestructive, internal, chemical analysis of tablets, capsules and other dosage forms.

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