title: Improving Optical Temperature Sensing Performance of Er3+Doped Y2O3Microtubes via Co-doping and Controlling Excitation Power.
abstract: This work presents a new method to effectively improve the optical temperature behavior of Er3+doped Y2O3microtubes by co-doping of Tm3+or Ho3+ion and controlling excitation power. The influence of Tm3+or Ho3+ion on optical temperature behavior of Y2O3:Er3+microtubes is investigated by analyzing the temperature and excitation power dependent emission spectra, thermal quenching ratios, fluorescence intensity ratios, and sensitivity. It is found that the thermal quenching of Y2O3:Er3+microtubes is inhibited by co-doping with Tm3+or Ho3+ion, moreover the maximum sensitivity value based on the thermal coupled4S3/2/2H11/2levels is enhanced greatly and shifts to the high temperature range, while the maximum sensitivity based on4F9/2(1)/4F9/2(2)levels shifts to the low temperature range and greatly increases. The sensitivity values are dependent on the excitation power, and reach two maximum values of 0.0529/K at 24 K and 0.0057/K at 457 K for the Y2O3:1%Er3+, 0.5%Ho3+at 121 mW/mm2excitation power, which makes optical temperature measurement in wide temperature range possible. The mechanism of changing the sensitivity upon different excitation densities is discussed.
authors.affiliation: College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing, 210023, People's Republic of China. xfwang@njupt.edu.cn.
authors.forename: Xiangfu
authors.initials: X
authors.lastname: Wang
authors.affiliation: College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing, 210023, People's Republic of China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Institute of Sensors, Signals and Systems, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
authors.forename: Jose
authors.identifier: http://orcid.org/0000-0002-1807-3369
authors.initials: J
authors.lastname: Marques-Hueso
authors.affiliation: College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing, 210023, People's Republic of China. yanxh@njupt.edu.cn.|School of Material Science and Engineering, Jiangsu University, Zhenjiang, 212013, People's Republic of China. yanxh@njupt.edu.cn.|College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, People's Republic of China. yanxh@njupt.edu.cn.
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Yan