Photostimulation induced persistent luminescence in Y3Al2Ga3O12:Cr3+
Photostimulation induced persistent luminescence in Y3Al2Ga3O12:Cr3+
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DOI：
10.1364/ome.6.001405
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发表时间：
2016-04-01
影响因子：
2.8
通讯作者：
Tanabe, Setsuhisa
中科院分区：
文献类型：
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作者：
Katayama, Yumiko;Viana, Bruno;Tanabe, Setsuhisa
Cr~（3+）激活的Y_3Al_2Ga_3O_（12）石榴石（YAGG：Cr~（3+））余辉材料是一种潜在的活体成像材料。光致发光（PL）光谱和热释光（TSL）的辉光曲线的温度依赖性与几个条件，特别是光刺激波长的依赖性，仔细研究的角度深陷阱利用长期在体内成像。荧光光谱显示出典型的Cr~（3+）发射，主要由E-2 →（4）A（2）和T-4（2）→（4）A（2）跃迁引起。Cr~（3+）发光（E-2->（4）A（2）+T-4（2）->（4）A（2）跃迁）的积分光致发光强度在600 K以下不受温度猝灭的影响。从TSL发光曲线的测量中发现，可见光激发不能激活持续发光。然而，在这种材料中，通过红光至近红外光的光刺激诱导的持续发光是可能的。(C)2016美国光学学会
Cr3+-activated Y3Al2Ga3O12 garnet (YAGG:Cr3+) persistent phosphor has been recently reported as a potential candidate material for in vivo imaging application. Temperature dependence of photoluminescence (PL) spectra and thermostimulated luminescence (TSL) glow curves with several conditions, especially photostimulation wavelength dependence, were carefully investigated with the perspective of deep trap utilization for long-term in vivo imaging. The PL spectrum showed typical Cr3+ emission due to E-2 ->(4)A(2) and T-4(2)->(4)A(2) transitions. The integrated PL intensity of Cr3+ luminescence (E-2 ->(4)A(2) plus T-4(2)->(4)A(2) transitions) does not suffer from temperature quenching up to 600 K. From the TSL glow curve measurements, it was found that the persistent luminescence cannot be activated by visible light excitation. However, photostimulation induced persistent luminescence by red to near-infrared light can be possible in this material. (C) 2016 Optical Society of America