摘要
采用提拉法生长了Yb3+掺杂量分别为5.4at%,16.3at%,27.1at%,53.6at%和100at%的Yb:Y3Al5O12晶体.系统地表征和分析了Yb3+掺杂量对晶体吸收光谱和荧光光谱的影响.随着Yb3+掺杂量的增加,各峰值吸收系数呈线性增加的趋势.应用Smakula公式计算了各吸收峰对应的振荡强度,并分析了Yb3+掺杂量对振荡强度的影响.当Yb3+掺杂量增加到27.1at%时观察到了荧光猝灭现象;当Yb3+掺杂量增加到53.6at%时,荧光光谱的线形发生了很大的变化.
Yb：Y3Al5O12 （Yb：YAG） single crystals with Yb^3＋ doping level of 5.4at%, 16.3at%, 27.1at%, 53.6at%, and 100at% were grown by the Czoehralski method. The effects of different Yb^3＋ doping level on the absorption spectra and fluorescence spectra were studied. The results showed that the real absorption coefficient of the absorption peaks increases linearly with the increasing of Yb^3＋ doping level in Yb： YAG crystals. Absorption band oscillator strengths of Yb： YAG crystals were calculated with Smakula formula and the effects of different Yb^3＋ doping level on the oscillator strengths were also studied. The concentration quenching of fluorescence was observed when the Yb^3＋ doping level reached 27.1 at% in Yb：YAG crystals. The shape of fluorescence spectra of Yb： YAG could be significantly influenced when the Yb^3＋ doping level is higher than 53.6at%.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第8期4358-4364,共7页
Acta Physica Sinica
基金
国家高技术研究发展计划(批准号:2002AA311030)资助的课题.~~
关键词
吸收光谱
荧光光谱
自吸收
浓度猝灭
absorption spectra, fluorescence spectra, self-absorption, concentration quenching
