Alexander Mamrashev, Fedor Minakov, Nazar Nikolaev, Valery Antsygin,
https://www.mdpi.com/2304-6732/8/6/213/pdf
We propose a method for measuring the terahertz properties for two principal optical axes of anisotropic crystals without optical activity using terahertz time-domain spectroscopy (THzTDS). The method put forward in this paper utilizes the inherent polarization sensitivity of the THz-TDS electro-optic detection system. We demonstrate the practical application of the method by measuring the temperature dependence of the refractive index and the absorption coefficient of a lithium triborate crystal for three optical axes.
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