Phd defense : Modelling of quasi-optical systems and original components for THz signal measurement

Location : IMT Atlantique

Phd student : Gregory GAUDIN

Keywords : Electromagnetisme,THz, Gaussian Beams, Quasi-Optical

Abstract : Terahertz (THz) radiation is gaining increasing attention due to its ability to penetrate various non-conductive materials such as plastics, ceramics, and textiles. It is used in numerous applications, including telecommunications, non-destructive material testing, security, and biomedical technologies, all of which requiring quasi-optical systems to manipulate these waves.
In this context, simulating complex quasi-optical systems is essential for designing more efficient devices. This thesis examines the use of asymptotic methods, such as the decomposition of an electromagnetic field into Gaussian beams (GB), to model the interaction of THz waves with quasi-optical components. After presenting the formalism of Gaussian beams, the developed simulator is used to model free-space material characterisation setups in the W and J bands, followed by the modeling of a focusing device for THz imaging.