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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 15, Iss. 4 — Apr. 1, 1998
  • pp: 1329–1334

Studies of shallow levels in undoped and rhodium-doped barium titanate

Hongwei Song, S. X. Dou, Mingjun Chi, Hong Gao, Yong Zhu, and Peixian Ye  »View Author Affiliations


JOSA B, Vol. 15, Issue 4, pp. 1329-1334 (1998)
http://dx.doi.org/10.1364/JOSAB.15.001329


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Abstract

Spectral and temporal characteristics of light-induced absorption for an undoped and a Rh-doped as-grown BaTiO3 crystal were investigated and compared. Two dark-decay time constants corresponding to two shallow levels were observed: 40 ms and 1.2 s for undoped BaTiO3 and 39 ms and 3.4 s for Rh-doped BaTiO3. The light-induced absorption spectra were resolved into two components according to the dark-decay time constants. The resolved spectra reveal that one shallow level in Rh-doped BaTiO3 and one in undoped BaTiO3 are caused by a same impurity defect. The thermal activation energies of these levels were determined to be 0.53 and 0.7 eV for undoped BaTiO3 and 0.57 and 0.8 eV for Rh-doped BaTiO3. The 0.8-eV shallow level in BaTiO3:Rh is caused by Rh4+/5+; the other level, 0.57 eV, is the one that has the same defect origin as the 0.53 eV level in undoped BaTiO3. Other parameters for the shallow levels are also given.

© 1998 Optical Society of America

OCIS Codes
(160.5320) Materials : Photorefractive materials
(190.0190) Nonlinear optics : Nonlinear optics

Citation
Hongwei Song, S. X. Dou, Mingjun Chi, Hong Gao, Yong Zhu, and Peixian Ye, "Studies of shallow levels in undoped and rhodium-doped barium titanate," J. Opt. Soc. Am. B 15, 1329-1334 (1998)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-15-4-1329

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