Excited-state absorption in the Cr6+O2- center in Li2B4O7 glass

Czeslaw Koepke; Krzysztof Wisniewski; Marek Grinberg

doi:10.1117/12.435851

10 August 2001 Excited-state absorption in the Cr⁶⁺O²- center in Li₂B₄O₇ glass

Czeslaw Koepke, Krzysztof Wisniewski, Marek Grinberg

Proceedings Volume 4412, International Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals; (2001) https://doi.org/10.1117/12.435851
Event: International Conference on Solid State Crystals 2000, 2000, Zakopane, Poland

Abstract

We present excited state absorption (ESA) measurements of the Cr:Li₂B₄O₇ glass along with preliminary interpretation. The most distinct feature in the ESA characteristics is connected with the presence of chromium in its hexe-valence states. The Cr⁶⁺ ions appear to contribute in the deexcitation processes and their evidence can be seen in the ESA spectra under excitation wavelength at 308 nm. We interpret the ESA spectra detected with UV excitation in terms of transitions in the framework of Cr⁵⁺O^- center which forms aster charge- transfer-type absorption in (CrO₄)^2- group. We assume the presence of the double-electron state of the 3d²2p⁴ electronic configuration together with crystal field-split states of the 3d¹2p⁵ configuration, both allow to reproduce the obtained ESA spectra.

Citation Download Citation

Czeslaw Koepke, Krzysztof Wisniewski, and Marek Grinberg "Excited-state absorption in the Cr⁶⁺O²- center in Li₂B₄O₇ glass", Proc. SPIE 4412, International Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals, (10 August 2001); https://doi.org/10.1117/12.435851

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