Detection and generation of THz radiation by plasma waves in nanometric two-dimensional systems
Université Montpellier II
International EraNet Project TERASENS
"TeraHertz Sensors for health protection "
January 2016-December 2017

Consortium :
Project Coordinator:  Dr. N. Diakonova, Laboratoire Charles Coulomb, UMR5221 CNRS&UM; Montpellier, France
Project Partner 1:      Prof. V. Gavrilenko, Institute for Physics of Microstructures of Russian Academy of Sciences, Niznii Novgorod, Russian Federation
Project Partner 2:      Prof., Academician E.Arushanov, Institute of Applied Physics of the Academy of Sciences of Moldova, Chisinau,Republic of Moldova
Project Partner 3:      M. T. Antonini, Terahertz Waves Technologies, France
             This 2 years project aims at demonstrating the feasibility of nanotransistor based gas sensors suitable for breath analysis.
             For efficient diagnosis through breath analysis, at least 2 or 3 gases have to be analyzed at the same time. For instance, CO, NO and NH3 are biomarkers for respiratory diseases, but NO also reveals gastrointestinal diseases and NH3, liver related diseases. These gases-biomarkers have distinctive non-overlapping features in terahertz frequency range. This can be used for their detection and concentration test by terahertz gas spectroscopy, the feasibility of which has been shown recently. The sensitivity of this method is determined to a great extend by terahertz detector. Meanwhile, it has been shown that nanotransistors can be used as efficient detectors in terahertz domain.
             One of the aims of this project is therefore to demonstrate the ability of nanotransistors to be used for Terahertz breath analysis and to develop its best material and geometrical configuration. We will focus our research on the detection of CO and NO gases using nanometric GaN based Field Effect Transistors (FET), single and double HgTe quantum well-based as well as MoS2 - GaN/AlGAN-based FET structures.

Publications on the project