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4 November 2010 THz spectroscopy and polarization of jade
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A terahertz time-domain spectrometer is employed to study various properties of jade, including the kind identification and polarization analysis. The characteristic absorption spectra and refractive index of jade are obtained in the range of 0.2 to 2.6 THz. Studying the absorption spectra and the transmission temporal THz waveform with two peaks, which were confirmed to be coming from ordinary and extraordinary beams, respectively, and result in fake absorption features. A practical ways are suggested to remove the fake absorption features and therefore the real absorption spectra of jade which accurately indicate the information of the samples can be obtained.
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Xuejiao Guo, Wei Xiong, and Jingling Shen "THz spectroscopy and polarization of jade", Proc. SPIE 7854, Infrared, Millimeter Wave, and Terahertz Technologies, 78542H (4 November 2010);

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