
Proceedings Paper
Study on terahertz generation from LiNbO[sub]3[/sub] crystal with density function theoryFormat | Member Price | Non-Member Price |
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Paper Abstract
Terahertz(THz) wave, which lies between infrared and microwave in electromagnetic spectrum, belongs to
far-infrared band. THz-wave covers the frequency range from 0.1THz to 10THz. The physical mechanism of
terahertz generation was discussed in this paper. It provided theoretical foundation for designing
terahertz-generator of LiNbO3 crystal and optimizing output property of terahertz through the analysis of internal
mechanism. The polariton dispersion characteristic was mainly reflected by its dispersion curve. Density functional
theory (DFT) was used to calculate Raman spectrum and dispersion curve for LiNbO3 in this paper. The polariton
dispersion curve of LiNbO3 indicated that the frequencies between 0THz and 7.5THz (the wave numbers were
0cm-1 250cm-1) were generated from LiNbO3 crystal when the scattering angle were about 0 - 5 degree. This
predicted theoretically that terahertz was generated from LiNbO3. It was very obvious that the Raman vibration
modes of crystal model were more than molecular structure. Intermolecular vibrations were depicted by molecular
structure and parts of vibration modes were simulated. But whole vibration-rotation of unit cell was depicted by
crystal model and all atoms were concerned with vibration. It was more accurate that the prediction about
generated THz-wave and the range of THz-wave by crystal model than by molecular structure based on the
analysis of polariton dispersion curves because crystal model was close to the experimental sample.
Paper Details
Date Published: 4 August 2009
PDF: 7 pages
Proc. SPIE 7385, International Symposium on Photoelectronic Detection and Imaging 2009: Terahertz and High Energy Radiation Detection Technologies and Applications, 73851M (4 August 2009); doi: 10.1117/12.836614
Published in SPIE Proceedings Vol. 7385:
International Symposium on Photoelectronic Detection and Imaging 2009: Terahertz and High Energy Radiation Detection Technologies and Applications
X.-C. Zhang; James M. Ryan; Cun-lin Zhang; Chuan-xiang Tang, Editor(s)
PDF: 7 pages
Proc. SPIE 7385, International Symposium on Photoelectronic Detection and Imaging 2009: Terahertz and High Energy Radiation Detection Technologies and Applications, 73851M (4 August 2009); doi: 10.1117/12.836614
Show Author Affiliations
Xianbin Zhang, Xi'an Univ. of Technology (China)
Liping Zhang, Xi'an Univ. of Technology (China)
Bing Cao, Xi'an Univ. of Technology (China)
Liping Zhang, Xi'an Univ. of Technology (China)
Bing Cao, Xi'an Univ. of Technology (China)
Yong Li, Xi'an Univ. of Technology (China)
Xinpeng Zhang, Xi'an Univ. of Technology (China)
Wei Shi, Xi'an Univ. of Technology (China)
Xinpeng Zhang, Xi'an Univ. of Technology (China)
Wei Shi, Xi'an Univ. of Technology (China)
Published in SPIE Proceedings Vol. 7385:
International Symposium on Photoelectronic Detection and Imaging 2009: Terahertz and High Energy Radiation Detection Technologies and Applications
X.-C. Zhang; James M. Ryan; Cun-lin Zhang; Chuan-xiang Tang, Editor(s)
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