The Applications of Terahertz Spectroscopy in Functional Optical Materials Researches

Abstract:

Terahertz radiation refers to the electromagnetic wave whose frequency is usually defined between 0.1 and 10 THz (1 THz=10¹² Hz). With the development of the emission and detection technologies of THz radiation, terahertz time-domain spectroscopy (THz-TDS) has been widely used in medical diagnosis, security inspection and materials characterization. In this paper, we introduced briefly the progress of terahertz measurement technologies, and then reviewed the applications of THz spectra in functional materials researches. As two important functional optical materials, TiO₂ nanoparticles and yttrium aluminum garnet (YAG) crystal have been investigated with THz-TDS. We introduced the electron injection process in TiO₂ studied by time resolved THz spectroscopy which is reported in the literature, and then presented our own work, the THz optical constants of undoped and Tm³⁺ doped YAG crystals.

• Periodical: Applied Mechanics and Materials (Volume 320)
• Pages: 133-137
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.320.133
• Online since: May 2013
• Authors: Xiao Jian Fu, Ji Zhou
• Keywords: Nano-TiO₂, Terahertz Spectroscopy, THz Response, YAG Crystal

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