Optical orientation of dipolar centers in Bi12SiO20 crystal grown in an oxygen-free atmosphere

Alexander I. Grachev; Ervin Nippolainen; Alexei A. Kamshilin

doi:10.1117/12.803914

5 June 2008 Optical orientation of dipolar centers in Bi₁₂SiO₂₀ crystal grown in an oxygen-free atmosphere

Alexander I. Grachev, Ervin Nippolainen, Alexei A. Kamshilin

Proceedings Volume 7022, Advanced Laser Technologies 2007; 70220B (2008) https://doi.org/10.1117/12.803914
Event: Advanced Laser Technologies 2007, 2007, Levi, Finland

Abstract

In this paper, we report theoretical description and first experimental observation of recently predicted phenomenon called optical orientation of local centers with permanent dipole moment. An electrical current arising at periodical modulation of the polarization of incident light was observed in a crystal of Bi₁₂SiO₂₀ grown in the argon atmosphere. Modulation frequency-dependence of the current amplitude allows us to attribute this current to the predicted effect. This deduction was additionally supported by our experimental data of light-induced dichroism and photoconductivity of the sample. Using a model of donor-acceptor pairs as dipolar centers we were able to explain features of optical orientation of dipolar centers in the crystal.

Citation Download Citation

Alexander I. Grachev, Ervin Nippolainen, and Alexei A. Kamshilin "Optical orientation of dipolar centers in Bi₁₂SiO₂₀ crystal grown in an oxygen-free atmosphere", Proc. SPIE 7022, Advanced Laser Technologies 2007, 70220B (5 June 2008); https://doi.org/10.1117/12.803914

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