Luminescence of disordered crystals with langasite structure doped with chromium ions |
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| Authors: | L N Alyabyeva V I Burkov V A Kotov |
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| Affiliation: | 1.Moscow Institute of Physics and Technology (State University),Dolgoprudnyi, Moscow oblast,Russia;2.Kotel’nikov Institute of Radio Engineering and Electronics,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | The luminescence, absorption and circular dichroism spectra of langasite family crystals La3Ga5-SiO14 and Sr3Ga2Ge4O14 doped with chromium ions (0.1 at %) are studied in the region of 300–1200 nm. It is demonstrated that these spectra contain bands typical of both a Cr3+ ion in an octahedral environment (position 1a) and a Cr4+ ion in a tetrahedral site (position 2d). The intensities of these bands differ considerably. |
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