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Proceedings Paper

Photon-excited fluorescence of rare-earth ions-doped gasses by femtosecond laser irradiation
Author(s): Masayuki Nogami; Hongpeng You
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Paper Abstract

Local modification of Eu3+ ions doped in SnO2- and Al2O3-SiO2 glasses was investigated using a femtosecond laser pulse. SnO2 nanocrystals were successfully precipitated in transparent glasses by irradiation with an 800-nm femtosecond laser. Upon laser irradiation, the Sn atoms were activated to react with oxygen, resulting in the formation of SnO2 nanocrystals. The precipitated SnO2 crystals grew up to ca. 5 nm size by the Joule-heating effect of the laser. The fluorescence intensities of the codoped-Eu3+ ions were enhanced higher than 100 times that of the glass without nanocrystals by exciting with the energy corresponding to the absorption edge of the SnO2 nanocrystals, the energy of which is effectively transferred to the Eu3+ ions. Near-infrared to visible up-converted fluorescence was observed in the Eu+3 ions doped in the Al2O3-SiO2 glasses during femtosecond laser irradiation. The dependence of the intensity of the Eu3+-emission on the pump power reveals that the three-photon excitation is dominant in the up-conversion process. These glasses can provide a bright prospect for their optical applications.

Paper Details

Date Published: 15 February 2006
PDF: 8 pages
Proc. SPIE 6118, Ultrafast Phenomena in Semiconductors and Nanostructure Materials X, 61180N (15 February 2006); doi: 10.1117/12.674043
Show Author Affiliations
Masayuki Nogami, Nagoya Institute of Technology (Japan)
Hongpeng You, Nagoya Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 6118:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials X
Kong-Thon Tsen; Jin-Joo Song; Hongxing Jiang, Editor(s)

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