ABSTRACT
The unique and characteristic properties of Terahertz (THz) waves offered the opportunity to develop THz chemical spectroscopy, which has been attracting great interest not only in basic research but also for practical applications in a wide variety of fields. The success of THz chemical spectroscopy is characterized by THz time domain spectroscopy (THz-TDS) and THz spectroscopic imaging (TSI) based on TDS. It has proved to be an effective method for the safe and nondestructive analysis of chemical compounds that contain weak intermolecular interactions such as hydrogen bonds. This chapter introduces recent studies in THz chemical spectroscopy to show its potential for detecting and identifying chemical compounds in unknown mixture samples such as a real drug tablet. Some brief remarks are provided on future developments, the main issues, and the prospects for THz chemical spectroscopy.
