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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 14 — Jul. 15, 2013
  • pp: 2581–2583

Optical tuning of dielectric properties of SrTiO3:Fe in the terahertz range

Liang Wu, Linkun Jiang, Quan Sheng, Xin Ding, and Jianquan Yao  »View Author Affiliations


Optics Letters, Vol. 38, Issue 14, pp. 2581-2583 (2013)
http://dx.doi.org/10.1364/OL.38.002581


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Abstract

Tuning of the dielectric permittivity spectra of iron-doped strontium titanate (SrTiO3:Fe) single crystals in an external optical field is investigated at room temperature by means of terahertz time-domain spectroscopy. Application of the optical field leads to an appreciable tuning of the permittivity, which reaches up to 3.8%. The observed behavior is interpreted in terms of soft-mode hardening due to the anharmonic character of its potential. We also find that the change of refractive index has a linear relationship on scale with the applied light power. These findings are attributed to the internal space charge field of photorefraction caused by the excited free carriers.

© 2013 Optical Society of America

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

ToC Category:
Spectroscopy

History
Original Manuscript: April 25, 2013
Revised Manuscript: May 30, 2013
Manuscript Accepted: June 24, 2013
Published: July 15, 2013

Citation
Liang Wu, Linkun Jiang, Quan Sheng, Xin Ding, and Jianquan Yao, "Optical tuning of dielectric properties of SrTiO3:Fe in the terahertz range," Opt. Lett. 38, 2581-2583 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-14-2581


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