Terahertz Chemical Microscope for intelligent sensing and chemical analysis

电磁频谱的太赫兹（THz）部分，位于电子频率（>0.1 THz）和光子频率（< 30 THz）之下，代表了光的商业应用的最后前沿。许多应用是可能的，这些太赫兹脉冲。然而，THz辐射的一些特性阻碍了其在工业中的广泛应用。首先，太赫兹辐射对极性液体（例如水）具有高度吸收性，因此难以用于涉及大多数水性介质的应用。其次，即使对于纯材料，太赫兹吸收光谱也是复杂的，因此常规太赫兹光谱学迅速失去其识别复杂混合物的有效性，这是人们在真实的世界中经常面临的。

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.