Infrared femtosecond laser induced visible long-lasting phosphorescence in Mn2+-Doped sodium borate glasses

被引:24
作者
Qiu, JR
Kondo, Y
Miura, K
Mitsuyu, T
Hirao, K
机构
[1] JST, ERATO, Hirao Act Glass Project, Superlab 206, Kyoto 6190237, Japan
[2] Kyoto Univ, Grad Sch Engn, Dept Chem Mat, Sakyo Ku, Kyoto 6068501, Japan
来源
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1999年 / 38卷 / 6AB期
关键词
long-lasting phosphorescence; Mn2+; glass; femtosecond laser; defect;
D O I
10.1143/JJAP.38.L649
中图分类号
O59 [应用物理学];
学科分类号
摘要
We report on the long-lasting phosphorescence phenomenon in Mn2+-doped sodium borate glass. After scanning by a focused 800 nm femtosecond laser for 10 s, the path traversed by the focal point of the laser in the glass emits reddish long-lasting phosphorescence visible to the naked eye in the dark five minutes after the removal of the activating laser. Absorption spectra of the glass showed that defect centers were induced after laser irradiation, and the absorption due to the laser-induced defect centers decayed with time. The long-lasting phosphorescence is considered to be due to the thermostimulated recombination of holes and electrons at traps induced by the laser irradiation, and energy transfer from the composite defect centers to Mn2+ ions.
引用
收藏
页码:L649 / L651
页数:3
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