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TERAHERTZ IMAGING FOR NONDESTRUCTIVE EVALUATION AND MATERIAL CHARACTERIZATION A Dissertation Presented to The Academic Faculty

Abstract : Thanks to the emergence of powerful light sources and highly sensitive detectors operating in the terahertz (THz) spectral region, the traditional THz ‘gap’ (0.1-10 THz) is shrinking fast nowadays. Recent advances in photonics and electronics enables the development of compact but sophisticated THz time domain spectroscopy (TDS) systems. Today, pulsed THz imaging based on THz-TDS systems is investigated in many areas spanning from nondestructive evaluation (NDE), industrial quality control, medical imaging and security sectors to studies of fundamental physics and cultural heritage. Despite the on-going broad applications of THz imaging, a THz ‘killer application’– a novel, innovative use in which THz imaging exhibits higher performance than any other existing techniques, is still waiting to be clearly identified. Therefore, the research problems of this thesis aim at the exploration of the potential of THz imaging in the fields of industry and cultural heritage conservation science, and developing theories and techniques to enhance the capabilities of THz imaging to solve practical problems in NDE and material characterization. The thesis is outlined as follows.
Keywords : Terahertz
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Junliang Dong. TERAHERTZ IMAGING FOR NONDESTRUCTIVE EVALUATION AND MATERIAL CHARACTERIZATION A Dissertation Presented to The Academic Faculty. Quantum Physics [quant-ph]. École Doctorale de génie électrique et informatique, 2017. English. ⟨tel-02433323⟩

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