Terahertz spectroscopic detection of fine structures for Zinc phosphate

例如，太赫兹波的能量低至室温，其能级对应于氢键、范德华相互作用。太赫兹波对像水合物这样的软材料和潮湿的环境都很敏感。在本研究中，描述了磷酸锌精细结构的太赫兹检测。对具有不同水合结构的磷酸锌进行了太赫兹光谱测量。利用GaP晶体的两束近红外光束差频产生频率可调的窄带太赫兹波。以太赫兹光谱为基础，将太赫兹波反射吸收成像技术应用于钢板腐蚀产物的检测。结果表明，太赫兹技术是金属表面无损腐蚀检测的有效手段。

The energy of terahertz wave is as low as room temperature, for example, whose energy level corresponds to hydrogen bonding, van der Waals interactions. The terahertz wave is sensitive to soft materials such as hydrate as well as to wet conditions. In this study, the terahertz detection of fine structures for Zinc phosphate has been described. Terahertz spectra have been measured for Zinc phosphate with various hydration structures. The frequency tunable narrow band terahertz wave was generated by difference frequency generation of two near infrared beams from a GaP crystal. Based on the terahertz spectra, the reflection absorption imaging of terahertz wave was applied to detection of corrosion products on steel sheets. It was found that the terahertz wave technique is very available for non-destructive corrosion inspection of metal surface.