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Proceedings Paper

Optical modulation of permittivity for different doped near stoichiometric lithium niobate in the terahertz range
Author(s): Liang Wu; Furi Ling; Jinsong Liu; Jianquan Yao
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Paper Abstract

The dielectric properties of near-stoichiometric LiNbO3:Fe and LiNbO3:Ce single crystals have been investigated by using a terahertz time domain spectroscopy (THz-TDS) in a frequency range of 0.4-1.8 THz at room temperature. When coupled with an applied external optical field, obvious photorefractive effects were observed, resulting in the modulation of the complex dielectric constant for the crystals, and reached up to 3%. However, the dielectric loss does not change appreciably. These findings were attributed to the change of spontaneous polarization in the crystals caused by the internal space charge field of photorefraction.

Paper Details

Date Published: 14 March 2012
PDF: 7 pages
Proc. SPIE 8330, Photonics and Optoelectronics Meetings (POEM) 2011: Laser and Terahertz Science and Technology, 83300N (14 March 2012); doi: 10.1117/12.918092
Show Author Affiliations
Liang Wu, Huazhong Univ. of Science and Technology (China)
Furi Ling, Huazhong Univ. of Science and Technology (China)
Jinsong Liu, Huazhong Univ. of Science and Technology (China)
Jianquan Yao, Tianjin Univ. (China)
Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 8330:
Photonics and Optoelectronics Meetings (POEM) 2011: Laser and Terahertz Science and Technology
Jianquan Yao; X. C. Zhang; Dapeng Yan; Jinsong Liu, Editor(s)

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