Results of experimental investigations of the dispersion of the refractive index n(ν) and of the absorption coefficient α(ν) of a ZnGeP2 crystal in the frequency range 0.3–1 THz are presented. Their comparative analysis is performed. The spectra obtained can be used for real-time diagnostics of the material quality that requires integral characterization. The most informative spectral range in which considerable differences between the absorption coefficients are observed is determined to be 400–800 μm.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 6, pp. 80–87, June, 2019.
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Gribenyukov, A.I., Dorozhkin, K.V., Zinovev, M.M. et al. Diagnostics of Inclusions in ZnGeP2 Crystals by the Method of Terahertz Spectroscopy. Russ Phys J 62, 1009–1016 (2019). https://doi.org/10.1007/s11182-019-01808-7
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DOI: https://doi.org/10.1007/s11182-019-01808-7