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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 6 — Mar. 14, 2011
  • pp: 5118–5125

Dielectric behavior of CaCu3Ti4O12 ceramics in the terahertz range

Liang Wu, Furi Ling, Ting Liu, Jinsong Liu, Yebin Xu, and Jianquan Yao  »View Author Affiliations

Optics Express, Vol. 19, Issue 6, pp. 5118-5125 (2011)

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The dielectric properties of 1050 °C/12h sintered CaCu3Ti4O12 (CCTO) ceramics have been investigated by using terahertz time domain spectroscopy in the frequency range of 0.2-1.6 THz at room temperature. When applying an external optical field, an obvious variation of dielectric constant was observed and reached up to 7%. However, the dielectric loss does not change appreciably. From the results, we found the change of refractive index has a linear relationship on scale with the applied light intensity. These findings were attributed to the change of spontaneous polarization in the ceramic caused by the excited free carriers.

© 2011 OSA

OCIS Codes
(130.0250) Integrated optics : Optoelectronics
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Integrated Optics

Original Manuscript: January 19, 2011
Revised Manuscript: February 17, 2011
Manuscript Accepted: February 17, 2011
Published: March 2, 2011

Liang Wu, Furi Ling, Ting Liu, Jinsong Liu, Yebin Xu, and Jianquan Yao, "Dielectric behavior of CaCu3Ti4O12 ceramics in the terahertz range," Opt. Express 19, 5118-5125 (2011)

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