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Terahertz time-domain spectroscopic study of ferroelectrics

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5 Author(s)
Nishizawa, S. ; Cooperative Res. Center, Shinshu Univ., Nagano, Japan ; Kitahara, H. ; Tsumura, N. ; Takeda, M.W.
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A new compact instrument of terahertz time-domain spectrometry (THz-TDS) has been developed to expand the THz-TDS adaptation for far-infrared quantitative measurements on functional materials. THz-TDS enables us to measure simultaneously the spectral amplitude and phase shift in the far-infrared region between 1 and 100 cm-1 so that the real and imaginary parts of complex dielectric function can be estimated independently without the Kramers-Kronig analysis. The details of the new compact instrument of THz-TDS are introduced, and the complex dielectric function and the phonon-polariton dispersion relation of ferroelectric Li2Ge7O15 at 295 K are estimated and they are elucidated in terms of the Kurosawa formula.

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Terahertz Electronics Proceedings, 2002. IEEE Tenth International Conference on

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