Absorption spectra and circular dichroism of calcium and strontium gallogermanates doped by chromium

被引：0
|
作者：
Orekhova, VP [1 ]
Perekalina, ZB [1 ]
Kaldybaev, KA [1 ]
Mill, BV [1 ]
机构：
[1] Russian Acad Sci, Inst Crystallog, Moscow 117901, Russia
来源：
LIGHTMETRY: METROLOGY, SPECTROSCOPY, AND TESTING TECHNIQUES USING LIGHT | 2001年 / 4517卷
关键词：
absorption spectrum; circular dichroism; Ca; -; gallogermanate; Sr; crystals;
D O I：
10.1117/12.435949
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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.
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页码：55 / 58
页数：4
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