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On the fluorescence enhancement mechanism of Er3+ in germanate glass containing silver particles |
Li Xiang-Ping (李香萍)a b, Chen Bao-Jiu (陈宝玖)a, Shen Ren-Sheng (申人升)b, Zhang Jin-Su (张金苏)a, Sun Jia-Shi (孙佳石)a, Cheng Li-Hong (程丽红)a, Zhong Hai-Yang (仲海洋)a, Tian Yue (田跃)a, Fu Shao-Bo (付少博)a, Du Guo-Tong (杜国同 )b |
a Department of Physics, Dalian Maritime University, Dalian 116026, China; b School of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian 116024, China |
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Abstract The spectral properties of trivalent erbium ions (Er3+) are systematically studied in a melt-quenched germanate glass (60~GeO2-20PbO-10BaO-10K2O-0.1Ag2O) containing silver (Ag) particles. Thermal treatment of the material leads to the precipitation of Ag particles as observed by transmission electron microscopy and confirmed by absorption spectrum for the obvious surface plasmon resonance peak of Ag particles. The fluorescence from Er3+ in the 10-min-annealed sample with Ag particles is found to be 4.2 times enhancement compared with the unannealed sample excited by 488-nm Ar+ laser. A comparison is made between a spectral study performed on the unannealed Er3+-doped sample and the one annealed for 20~min. The data of absorption cross section and Judd-Ofelt intensity parameters show the agreement between the two samples no matter whether there are Ag particles, indicating that the introduction of Ag particles by post-heat treatment has no effect on the crystal field environment of Er3+ ions. And the fluorescence enhancement is attributed to the surface plasmon oscillations of Ag particles in germanate glass.
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Received: 25 June 2012
Revised: 10 August 2012
Accepted manuscript online:
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PACS:
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32.50.+d
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(Fluorescence, phosphorescence (including quenching))
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71.20.Eh
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(Rare earth metals and alloys)
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71.15.Qe
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(Excited states: methodology)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61078061 and 11104023); the Natural Science Foundation of Liaoning Province, China (Grant No. 20111032); the State Key Development Program for Basic Research of China Grant No. 2012CB626801); and the Fundamental Research Funds for the Central Universities (Grant No. 2011QN152). |
Corresponding Authors:
Chen Bao-Jiu
E-mail: chenmbj@sohu.com
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Cite this article:
Li Xiang-Ping (李香萍), Chen Bao-Jiu (陈宝玖), Shen Ren-Sheng (申人升), Zhang Jin-Su (张金苏), Sun Jia-Shi (孙佳石), Cheng Li-Hong (程丽红), Zhong Hai-Yang (仲海洋), Tian Yue (田跃), Fu Shao-Bo (付少博), Du Guo-Tong (杜国同 ) On the fluorescence enhancement mechanism of Er3+ in germanate glass containing silver particles 2013 Chin. Phys. B 22 023202
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