期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 356, 期 23-24, 页码 1097-1101出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2010.04.014
关键词
Glass; Erbium; Silver NPs; Luminescence; SPR
资金
- US National Science Foundation NSF-CREST-CA [HRD-0420516]
- US Department of Defense (DOD)/ARO [W911NF-08-1-0523]
- NSF-STC CLiPS [0423914]
- Direct For Education and Human Resources
- Division Of Human Resource Development [930018] Funding Source: National Science Foundation
- Division Of Human Resource Development
- Direct For Education and Human Resources [932038] Funding Source: National Science Foundation
The spectroscopic characteristics of an erbium-doped Ga10Ge25S65 (GGS) glass containing silver were studied and compared with that of an erbium-doped GGS glass without silver. The optical absorption spectra revealed the surface plasmon resonance (SPR) related characteristic of silver nanoparticles (NPs) around 490 nm. Enhancement of Er3+ luminescence was observed for a broad excitation wavelength region, and the largest enhancement was observed for the excitation at 488 nm, which is near the peak of SPR of silver NPs in GGS glass and in resonance with Er3+ ions. For the excitation at 405 nm, enhancement of luminescence from both GGS host and Er3+ ions was observed. A smaller enhancement was observed for a two-step upconversion luminescence excited at 801 nm. The observed enhancement of Er3+ luminescence is mainly attributed to the local field effects: the SPR of Ag NPs causes an intensified electromagnetic field around NPs, resulting in enhanced optical transitions of Er3+ ions in the vicinity. (C) 2010 Elsevier B.V. All rights reserved.
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