Light-induced absorption of Ru-doped Bi12TiO20 crystals

S. Piquette; Vera Marinova; Shiuan Huei Lin; Ken Yuh Hsu

doi:10.1117/12.543406

15 December 2003 Light-induced absorption of Ru-doped Bi₁₂TiO₂₀ crystals

S. Piquette, Vera Marinova, Shiuan Huei Lin, Ken Yuh Hsu

Proceedings Volume 5260, Applications of Photonic Technology 6; (2003) https://doi.org/10.1117/12.543406
Event: Applications of Photonic Technology, 2003, Quebec City, Québec, Canada

Abstract

The effect of ruthenium doping on optical properites of Bi₁₂TiO₂₀ (BTO) single crystals is studied. A low concentration of ruthernium does not change absorption behavior of BTO, however higher ruthenium addition significantly shifts the optical absorption to the near infrared spectral region with an absorption shoulder appearing around 1.8 eV. The absorption coefficient increases with increasing the Ru concentration. Light-induced absorption changes are observed and the dynamics of build-up and dark decay processes are investigated. Results show that concentration of shallow levels increase with Ru content. Evolution of the build-up and dark decay of light induced absorption consists of fast and slow components: the first process occurs within few seconds, while the second one needs several hours (or days). It is established that light-induced absorption can be modified by preliminary illumination and thermal treatments thus multi-level lead to the transient and persistent parts of light-induced absorption. A model, assuming one deep and two shalow levels is proposed to explain the bi-exponential behavior of the build-up and the dark decay of light-induced absorption when the crystals are preliminary annealed in oxygen atmosphere.

Citation Download Citation

S. Piquette, Vera Marinova, Shiuan Huei Lin, and Ken Yuh Hsu "Light-induced absorption of Ru-doped Bi₁₂TiO₂₀ crystals", Proc. SPIE 5260, Applications of Photonic Technology 6, (15 December 2003); https://doi.org/10.1117/12.543406

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KEYWORDS

Absorption

Crystals

Ruthenium

Laser beam diagnostics

Annealing

Neon

Atmospheric modeling

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