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Proceedings Paper

Far-infrared phonon-polariton dispersion studied by THz time-domain spectroscopy
Author(s): Seiji Kojima; Hideaki Kitahara; Seizi Nishizawa; Mitsuo Wada Takeda
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Paper Abstract

We report the study of far-infrared dielectric properties of a polar crystal using the THz time domain spectroscopy. We measured the power and phase transmission spectra by coherent THz radiation. The anisotropy of dielectric properties has been investigated simply by rotating the polarization plane of an incident beam. The frequency dependence of complex dielectric constant has been determined without the Kramers-Kronig analysis. The complex dispersion relation of phonon polariton frequency and damping has been also determined. These far-infrared properties have been consistently reproduced by the damped harmonic oscillator model related to the lowest frequency polar mode.

Paper Details

Date Published: 16 June 2004
PDF: 8 pages
Proc. SPIE 5352, Ultrafast Phenomena in Semiconductors and Nanostructure Materials VIII, (16 June 2004); doi: 10.1117/12.531057
Show Author Affiliations
Seiji Kojima, Univ. of Tsukuba (Japan)
Hideaki Kitahara, Shinshu Univ. (Japan)
Seizi Nishizawa, Fukui Univ. (Japan)
Mitsuo Wada Takeda, Shinshu Univ. (Japan)

Published in SPIE Proceedings Vol. 5352:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials VIII
Kong-Thon Tsen; Jin-Joo Song; Hongxing Jiang, Editor(s)

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