Broadband terahertz time-domain spectroscopy of ferroelectric LiTaO{sub 3}: Phonon-polariton dispersion
Abstract
The lowest frequency IR active A{sub 1}(z) and E(x) modes of a ferroelectric congruent lithium tantalate crystal were studied by the broadband polarized Terahertz Time-Domain Spectroscopy using the coherent THz radiation from 0.2 to 6.5 THz. The dispersion relations of the real and imaginary parts of a polariton wave vector were determined from the complex extraordinary and ordinary refractive indices for the A{sub 1}(z) and E(x) symmetry phonon-polaritons, respectively. The observed complex dispersion relations of two symmetries are in agreement within the experimental uncertainty with the calculated dispersion curves by the damped harmonic oscillator model.
- Authors:
-
- Division of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305-8573 (Japan)
- Publication Date:
- OSTI Identifier:
- 22390535
- Resource Type:
- Journal Article
- Journal Name:
- AIP Conference Proceedings
- Additional Journal Information:
- Journal Volume: 1627; Journal Issue: 1; Conference: 14. Electroceramics Conference, Bucharest (Romania), 16-20 Jun 2014; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CRYSTALS; DIAGRAMS; DISPERSION RELATIONS; FERROELECTRIC MATERIALS; HARMONIC OSCILLATOR MODELS; HARMONIC OSCILLATORS; LITHIUM COMPOUNDS; PHONONS; POLARONS; REFRACTIVE INDEX; SYMMETRY; TANTALATES; THZ RANGE; VECTORS
Citation Formats
Kojima, Seiji, and Mori, Tatsuya. Broadband terahertz time-domain spectroscopy of ferroelectric LiTaO{sub 3}: Phonon-polariton dispersion. United States: N. p., 2014.
Web. doi:10.1063/1.4901657.
Kojima, Seiji, & Mori, Tatsuya. Broadband terahertz time-domain spectroscopy of ferroelectric LiTaO{sub 3}: Phonon-polariton dispersion. United States. https://doi.org/10.1063/1.4901657
Kojima, Seiji, and Mori, Tatsuya. 2014.
"Broadband terahertz time-domain spectroscopy of ferroelectric LiTaO{sub 3}: Phonon-polariton dispersion". United States. https://doi.org/10.1063/1.4901657.
@article{osti_22390535,
title = {Broadband terahertz time-domain spectroscopy of ferroelectric LiTaO{sub 3}: Phonon-polariton dispersion},
author = {Kojima, Seiji and Mori, Tatsuya},
abstractNote = {The lowest frequency IR active A{sub 1}(z) and E(x) modes of a ferroelectric congruent lithium tantalate crystal were studied by the broadband polarized Terahertz Time-Domain Spectroscopy using the coherent THz radiation from 0.2 to 6.5 THz. The dispersion relations of the real and imaginary parts of a polariton wave vector were determined from the complex extraordinary and ordinary refractive indices for the A{sub 1}(z) and E(x) symmetry phonon-polaritons, respectively. The observed complex dispersion relations of two symmetries are in agreement within the experimental uncertainty with the calculated dispersion curves by the damped harmonic oscillator model.},
doi = {10.1063/1.4901657},
url = {https://www.osti.gov/biblio/22390535},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1627,
place = {United States},
year = {Wed Nov 05 00:00:00 EST 2014},
month = {Wed Nov 05 00:00:00 EST 2014}
}
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