2002•Journal of Applied PhysicsRequires access

Optical absorption spectroscopy of Fe2+ and Fe3+ ions in LiNbO3

S. A. Basun, Dean R. Evans, Timothy J. Bunning, Shekhar Guha, J. O. Barnes, G. R. Cook, R. S. Meltzer

Abstract

We provide a method to measure concentrations of Fe2+ and Fe3+ ions in LiNbO3. The method, based only on optical absorption spectroscopy, provides a convenient means to determine the absorption cross sections for Fe2+ and Fe3+ ions, along with an independent measurement of the Fe2+ and Fe3+ concentrations in a given LiNbO3 crystal. The absorption cross section of the Fe2+ ions found by this method correlated well with a previously measured value. The cross section of the Fe3+ ions was obtained. It was also found that in some samples a significant fraction of Fe ions did not contribute to the absorption in the visible.

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Key concepts: Ion, Absorption (acoustics), Spectroscopy, Absorption spectroscopy, Analytical Chemistry (journal), Crystal (programming language), Chemistry, Absorption cross section