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Terahertz birefringence of zinc oxide is investigated using terahertz time-domain spectroscopy. Birefringence is observed in the <10-10> orientation while not in the <0001> orientation. Dispersion of ordinary and extraordinary refractive indices are measured, and the refractive index difference is found to be -0.18 in the 0.25 ~ 1.35 THz frequency region. It is demonstrated through azimuthal...
We report on terahertz frequency and power measurements based on terahertz frequency comb and a bolometer. Terahertz frequency comb and its individual modes are measured through multiheterodyne beat detection by use of a bolometer. A power spectrum of terahertz frequency comb is measured over the frequency up to 1.7 THz, and the frequency and power of the comb modes spectrally resolved are measured...
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