Photonics (Jun 2021)

Terahertz Time-Domain Polarimetry for Principal Optical Axes of Anisotropic Crystals

  • Alexander Mamrashev,
  • Fedor Minakov,
  • Nazar Nikolaev,
  • Valery Antsygin

DOI
https://doi.org/10.3390/photonics8060213
Journal volume & issue
Vol. 8, no. 6
p. 213

Abstract

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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 (THz-TDS). 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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