Terahertz Pulse Detection Techniques and Imaging Applications

Abstract

Recent years have witnessed successful developments of detection techniques of teraherz (THz) pulse radiation and its imaging applications such as security, medicine and environmental sensing, to name an important few. Progress of detection techniques has been made in many aspects, including detection sensitivity, real-time detection, roomtemperature operation, detection bandwidth and dynamic range, spatial (wavefront) and temporal proiles and so on. New detection techniques utilizing cuting-edge materials, sensors, systems and even novel detection mechanisms contribute to advances in teraherz pulse detection. While detection techniques continuously improve, teraherz pulsed imaging (TPI) also inds broad and intriguing applications. For instance, TPI has shown applications in nondestructive evaluation in pharmaceutics, biomedical characterization of tissues, medical diagnosis of cancers, identiication of explosive hazards and examination of art and archeology. The chapter highlights recent progress of teraherz pulse detection techniques and imaging applications.

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“…These include their non-destructive nature, absence of ionizing radiation hazards, and ability to identify the unique fingerprint spectrum of molecular characteristics. Consequently, terahertz waves exhibit promising potential for extensive biomedicine use [80]. The structural changes and mineral contents of teeth observed using the terahertz imaging system strongly correlate with the findings of X-ray images.…”