Radiative transitions and spectral-hole burning in MgO: Cr3+ nanocrystals

被引：16
作者：
Zakharchenya, RI
Kaplyanskii, AA
Kulinkin, AB
Meltzer, RS
Feofilov, SP
机构：
[1] Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia
[2] Univ Georgia, Athens, GA 30602 USA
来源：
PHYSICS OF THE SOLID STATE | 2003年 / 45卷 / 11期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1134/1.1626764
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Luminescence spectra of Cr3+ ions in nanocrystalline MgO obtained by sol-gel technology were studied. The radiative lifetime of excited E-2 states of cubic and tetragonal Cr3+ centers was found to be considerably longer than that of bulk single crystals. This effect is caused by a modified effective refractive index of the inhomogeneous medium. Burning of long-lived spectral holes in the (4)A(2)-E-2 transition profile of cubic centers was observed, which sets nanocrystalline samples strongly apart from bulk crystals, where no hole burning was found. (C) 2003 MAIK "Nauka/Interperiodica".
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收藏
页码：2209 / 2212
页数：4
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