Terahertz Chemical Microscope for intelligent sensing and chemical analysis

太赫兹（THz）部分的电磁波谱，位于电子频率（>.1太赫兹）之上，光子学频率（< 30太赫兹）之下，代表了光的商业应用的最后前沿。这些太赫兹脉冲有许多可能的应用。然而，太赫兹辐射的几个特性阻碍了它在工业上的广泛应用。首先，太赫兹辐射对极性液体（如水）具有高度吸收性，因此很难应用于大多数含水介质。其次，太赫兹吸收光谱即使对于纯材料也是复杂的，因此传统的太赫兹光谱在识别复杂混合物时很快失去了有效性，这是人们在现实世界中经常面临的问题。

The terahertz (THz) portion of the electromagnetic spectrum, lying above the frequencies of electronics (>0.1 THz) and below those of photonics (< 30 THz), represents the last frontier of the commercial applications of light. A multitude of applications are possible with these THz pulses. However, there are several characteristics of THz radiation that are holding back its widespread applications in industry. First, THz radiation is highly absorptive to polar liquids, such as water, thus making it difficult for applications involving most aqueous media. Secondly, THz absorption spectra are complicated even for pure materials, and thus conventional THz spectroscopy rapidly loses its effectiveness for identifying complex mixtures, which is what one frequently faces in the real world.