Terahertz spectroscopy is a spectroscopic technique that uses terahertz waves (electromagnetic waves with frequencies ranging from 0.3 THz to 30 THz), a type of electromagnetic wave. By analyzing the transmission or reflection spectrum resulting from the interaction of light and matter in the terahertz frequency range, which cannot be measured by conventional spectroscopy, it is possible to measure the movement of electrons and ions on the surface and inside materials and devices. Terahertz spectroscopy is currently being used worldwide for applications such as cancer screening and tissue diagnosis in the medical field, quality control of pharmaceuticals, quality control in industrial areas such as semiconductor manufacturing, quality control and safety evaluation of food products, and investigation of the state of preservation of cultural assets. We are currently developing novel terahertz technology to evaluate energy materials and devices – specifically, materials and devices related to wide-gap semiconductors, solar cells, storage batteries, and spintronics.
