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Thermometry strategy developed based on fluorescence contrast driven by varying excitations in codoped LiNbO3

查看全文 作　　者：SIWEI [1]LONG;SHAOPENG [2]LIN;DECAI [2]MA;YUNZHONG [2]ZHU;HUASHAN [1]LI;BIAO [1,2]WANG 高影响力作者 机构地区：[1]School of Physics,Sun Yat-sen University,Guangzhou 510275,China;[2]Sino-French Institute of Nuclear Engineering and Technology,Sun Yat-sen University,Zhuhai 519082,China高影响力机构 出　　处：《Photonics Research》索引2020年第8卷第2期,共8页高影响力期刊 基　　金：National Natural Science Foundation of China(11302268,11372361,11804403,11832019);Science and Technology Planning Project of Guangdong Province(2015B090927005);Guangdong Natural Science Funds for Distinguished Young Scholar(2018B030306036);Fundamental Research Funds for the Central Universities(19lgpy273);Natural Science Foundation of Guangdong Province(2018A030313909)。 摘　　要：We propose what we believe is a novel optical thermometry strategy(FIR-Ex)based on the fluorescence intensity ratio(FIR)between two radiations associated with the same emission peak but different excitation wavelengths,in contrast to the traditional approach(FIR-Em),which depends on the FIR at varying emission wavelengths.The temperature-dependent FIR within the FIR-Ex strategy arises from the different charge/energy evolution routes,rather than the distribution of thermally coupled levels within the FIR-Em strategy.Considerable diversity in thermal behaviors and luminescence mechanisms was demonstrated by analyzing the 618 nm red emission in Pr^3+-doped congruent LiNbO3(Pr:CLN)under 360 and 463 nm excitations.The temperature sensitivity was further improved via Mg^2+ codoping due to the optimization of charge dynamics and energy transfer processes.Given its wide detection scope,relatively high absolute sensitivity at low temperature,and high tunability of temperature sensitivity,the FIR-Ex strategy is promising for developing optical temperature-sensing materials with high performance. 关 键 词：LINBO3 optical excitation
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