M.Yu. Vlasov, I.E.Merkulova, N.A.Nikolaev,
https://www.sciencedirect.com/science/article/pii/S2214785317317212
We measured the absorption coefficients and extinction ratio of ferroelectric lead germanate in the range of 0.2 – 1.2 THz by means of terahertz time-domain spectroscopy. We observed dramatic changes in the dichroism of the crystal induced by temperature shifts between 300 K and 493 K. We estimated the extinction ratio of lead germanate crystal-based wideband terahertz polarizers to be better than 1:105.
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