Five-photon UV upconversion emissions of Er3+ for temperature sensing

被引：115

作者：

Zheng, Kezhi ^{[1
]}

Song, Weiye ^{[1
]}

He, Guanghui ^{[1
]}

Yuan, Zhen ^{[2
]}

Qin, Weiping ^{[1
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China

[2] Univ Macau, Fac Hlth Sci, Bioimaging Core, Taipa, Macau, Peoples R China

来源：

OPTICS EXPRESS | 2015年 / 23卷 / 06期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

LUMINESCENCE; THERMOMETRY; NANOPARTICLES;

D O I：

10.1364/OE.23.007653

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Under 980 nm excitation, the temperature dependence of fivephoton UV (256 and 276 nm) upconversion luminescence in Yb3+-Er3+ codoped beta-NaLuF4 nanocrystals was studied from 303 K to 523 K. The D-4(7/2) and (4)G(9/2) levels of Er3+ are confirmed to be thermally coupled levels. They are the highest energy states for optical thermometry known so far. By using fluorescence intensity ratio technique, optical temperature sensing characteristics based on the D-4(7/2)/(4)G(9/2) -> I-4(15/2) transitions of Er3+ were reported here for the first time. The obtained sensitivity of this UV-based sensor is higher than that of green-based optical thermometer in low temperature range. (C)2015 Optical Society of America

引用

页码：7653 / 7658

页数：6

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