Terahertz.fr

Jean-Paul Guillet personal page

Frequency from 100 GHz to 10 THz, wavelenght from 3mm to 30µm , crosses most dielectrics, absorbed by water, total reflection on metal and non ionising
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What is terahertz?

Terahertz frequency band

Terahertz (THz) waves is a part of the electromagnetic spectrum between infrared and microwave radiation corresponding to wavelenghts from 3 mm to 100 µm. In the frequency domain, it consists of the band from 100 GHz to 30 THz (See Fig 1.). For 1 Thz, wavelenght is about 300 µm, photo energy is 4.135 meV and period is 1ps. Order of magnitude of THz waves can discovered with this Terahertz frequency converter application.

Fig 1. Terahertz spectrum is from 100 Ghz to 30 THz

Terahertz properties

The main properties of THz are non-ionizing, good penetration in a wide variety of materials (plastic, wood, composite material, clothes, paper, ceramics, etc), except conducting materials (ex: metal and water). Several molecules have spectral fingerprint in the terahertz frequency band.

Main properties of terahertz waves

Terahertz Applications

Due to penetration and spectral properties, terahertz waves  can be used for imaging and spectroscopy. They have several applications like non destructive test of material (like composite), astronomy, body scanner, communications, biomedical, etc. Spectral properties are important for molecule identification (explosive, medecine, alcanes or biomedical identification).

More Stories

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Skeletonization and 3D rendering with real time terahertz tomography

In this collaborative article between Lytid, IMS and Noctylio, we explore the application of terahertz (THz) technology in tomography to create 3D reconstructions in real time. The experimental setup is based on a latest generation micro-bolometric camera with 240×320 pixels, equipped with an anti-reflective coated lens developed by Lytid, to record the projection images of…

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Feasibility of Using a 300 GHz Radar to Detect Fractures and Lithological Changes in Rocks

This article examines the possibility of using a high frequency radar (300 GHz) to detect fractures and lithological changes in rocks. This study, carried out in collaboration between Federico Sanjuan (University of Pau, France) and the IMS laboratory (University of Bordeaux), is in the context of the improvement of the methods of detection and quantification…

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Terahertz diffractive imaging with saturated data inpainting

This article focuses on improving diffraction imaging techniques in the field of Térahertz frequencies, by approaching the problem of data saturation due to the limited dynamic range of detection systems. We introduce with the ITMO team (Nikolay V Petrov Team) a new approach to algorithmic reconstruction which deals with saturated areas in the measured intensity…