| Influences of Mg^2＋ ion on dopant occupancy and upconversion luminescence of Ho^3＋ ion in LiNbO3 crystal |
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| 作者姓名： | 代丽 徐超 张颖 李大勇 徐玉恒 |
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| 作者单位： | [1]School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, China [2]Applied Science College, Harbin University of Science and Technology, Harbin 150080, China [3]Department of the Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China |
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| 基金项目： | Project supported by the China Postdoctoral Science Foundation （Grant No. 2012M520759 ） and the Science and Technology Research Project of Education Bureau of Heilongjiang Province, China （Grant No. 12531098）. |
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| 摘 要： | The effects of a Mg^2＋ ion on the dopant occupancy and upconversion luminescence of a Ho^3＋ ion in LiNbO3 crystal are reported. The birefringence gradient of the crystal is measured to investigate the optical homogeneity. The X-ray powder diffraction spectrum and the upconversion luminescence are used to investigate defect structure and spectroscopic properties of Mg,Ho：LiNbO3. Under 808-nm excitation, blue, red, and very intense yellow-green bands are observed. Based on the energy levels of Ho^3＋ in LiNbO3, and the pump intensity dependence of the observed emission, an excitation scheme is presented. The upconversion emission spectra reveal an enhancement of upconversion intensity when the Mg^2＋ ions are introduced into Ho：LiNbO3. The main upconversion mechanism is discussed in this work.
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| 关 键 词： | LiNbO3晶体 上转换发光 离子对 占用 掺杂 铌酸锂晶体 镁 发射光谱 |
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