Optical temperature sensing of NaYbF4: Tm3+@SiO2 core-shell micro-particles induced by infrared excitation.
Optical temperature sensing of NaYbF4: Tm3+@SiO2 core-shell micro-particles induced by infrared excitation.
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DOI：
10.1364/oe.21.021596
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发表时间：
2013-09
期刊：
影响因子：
3.8
通讯作者：
Xiangfu Wang;Jin Zheng;Y. Xuan;Xiaohong Yan
中科院分区：
文献类型：
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作者：
Xiangfu Wang;Jin Zheng;Y. Xuan;Xiaohong Yan
采用水热法和超声包覆法制备了NaYbF(4):Tm3+@SiO(2)核壳微颗粒。采用980 nm红外激光作为激发源，对NaYbF4: Tm(3+)@SiO(2)核壳微粒子进行了光学感温实验。在100~700 K范围内，分析了Tm（3+）离子热耦合(1)D(2)/(1)G(4)和(3)F(2) /(3)H(4)能级的荧光强度比、光学温度灵敏度和温度依赖的种群再分布能力，以验证其作为光学温度传感器的可行性。在430 K时的最小灵敏度为5.4 × 10(-4) K(-1)，具有较好的低温传感器性能。在较高的温度范围内，温度诱导的种群从(1)D(2) /(1)G(4)热耦合水平重新分布。
NaYbF(4):Tm3+@SiO(2) core-shell micro-particles were synthesized by a hydrothermal method and subsequent ultrasonic coating process. Optical temperature sensing has been observed in NaYbF4: Tm(3+)@SiO(2)core-shell micro-particles with a 980 nm infrared laser as excitation source.The fluorescence intensity ratios, optical temperature sensitivity, and temperature dependent population re-distribution ability from the thermally coupled (1)D(2)/(1)G(4) and (3)F(2) /(3)H(4) levels of the Tm(3+) ion have been analyzed as a function of temperature in the range of 100~700 K in order to check its availability as a optical temperature sensor. A better behavior as a lowtemperature sensor has been obtained with a minimum sensitivity of 5.4 × 10(-4) K(-1) at 430 K. It exhibits temperature induced population re-distribution from (1)D(2) /(1)G(4) thermally coupled levels at higher temperature range.