中国物理B ›› 2013, Vol. 22 ›› Issue (9): 94201-094201.doi: 10.1088/1674-1056/22/9/094201
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
代丽a b, 徐超c, 张颖a, 李大勇a, 徐玉恒c
Dai Li (代丽)a b, Xu Chao (徐超)c, Zhang Ying (张颖)a, Li Da-Yong (李大勇)a, Xu Yu-Heng (徐玉恒)c
摘要: The effects of a Mg2+ ion on the dopant occupancy and upconversion luminescence of a Ho3+ 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 Ho3+ 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 Mg2+ ions are introduced into Ho:LiNbO3. The main upconversion mechanism is discussed in this work.
中图分类号: (Diffraction and scattering)