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Proceedings Paper

Absorption spectra and circular dichroism of calcium and strontium gallogermanates doped by chromium
Author(s): V. P. Orekhova; Zoya Borisovna Perekalina; K. A. Kaldybaev; B. V. Mill
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Paper Abstract

The absorption spectra and circular dichroism of gallogermanate crystals Ca3Ga2Ge4O14 and Sr3Ga2Ge4O14, undoped and Cr-doped are investigated. In absorption spectra of all doped crystals three bands connected with ions Cr3+ in octahedral coordination are found. Besides in doped crystals Sr3Ga2Ge4O14 additional low-intensive bands connected apparently with Cr4+ ions in tetrahedral coordination are presented. In circular dichroism (CD) spectra of doped crystals the absorption bands connected to Cr3+ ions are found and the additional ones, which are not connected with Cr3+ ions. Probably these additional bands in CD spectra in both type crystals are connected with defects generating during crystals growth. The rotary forces of transition are determined from CD spectra.

Paper Details

Date Published: 10 August 2001
PDF: 4 pages
Proc. SPIE 4517, Lightmetry: Metrology, Spectroscopy, and Testing Techniques Using Light, (10 August 2001); doi: 10.1117/12.435949
Show Author Affiliations
V. P. Orekhova, Institute of Crystallography (Russia)
Zoya Borisovna Perekalina, Institute of Crystallography (Russia)
K. A. Kaldybaev, Issyk-Kul Univ. (Kirgizstan)
B. V. Mill, M.V. Lomonosov Moscow State Univ. (Russia)

Published in SPIE Proceedings Vol. 4517:
Lightmetry: Metrology, Spectroscopy, and Testing Techniques Using Light
Maksymilian Pluta, Editor(s)

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