THz Gas Sensing Using Terahertz Time-Domain Spectroscopy with Ceramic Architecture

Terahertz (THz)waves are electromagnetic waves with wavelengths longer than X-rays, ultraviolet, visible, and infrared light, and shorter than microwaves and radio waves. This unexplored region includes the rotational motion of gas molecules, second-order dielectric relaxation and crystalline phonons in solid molecules, and stretching and angular motion of hydrogen bonds in liquid molecules. For instance, in the mid-infrared region, these are intramolecular modes. However, in the THz region, they are intermolecular modes. This means that THz waves can be used to measure the intermolecular vibrations and kinetic state of molecular clusters. I proposed room-temperature THz gas sensing using terahertz time-domain spectroscopy (THz-TDS) (K.Komatsu et al., ACS Omega 2022, 7, 35, 30768–30772 ). I am currently trying to measure hydrated odor gas sensing using terahertz light and ceramic architecture. This sensing technique is called terahertz gas-sensing (THGS). This work is currently supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI.