Far-infrared phonon-polariton dispersion studied by THz time-domain spectroscopy

Seiji Kojima; Hideaki Kitahara; Seizi Nishizawa; Mitsuo Wada Takeda

doi:10.1117/12.531057

16 June 2004 Far-infrared phonon-polariton dispersion studied by THz time-domain spectroscopy

Seiji Kojima, Hideaki Kitahara, Seizi Nishizawa, Mitsuo Wada Takeda

Proceedings Volume 5352, Ultrafast Phenomena in Semiconductors and Nanostructure Materials VIII; (2004) https://doi.org/10.1117/12.531057
Event: Integrated Optoelectronic Devices 2004, 2004, San Jose, CA, United States

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.

Citation Download Citation

Seiji Kojima, Hideaki Kitahara, Seizi Nishizawa, and Mitsuo Wada Takeda "Far-infrared phonon-polariton dispersion studied by THz time-domain spectroscopy", Proc. SPIE 5352, Ultrafast Phenomena in Semiconductors and Nanostructure Materials VIII, (16 June 2004); https://doi.org/10.1117/12.531057

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