Up-conversion emission in violet from yellow in Nd3+:SiO2-TiO2-Al2O3 sol-gel glasses

Q. Xiang, Y. Zhou, Y. L. Lam, Y. C. Chan, C. H. Kam, B. S. Ooi, H. X. Zhang, S. Buddhudu

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10 Scopus citations


This paper reports an up-conversion emission in violet (408 nm) from Nd3+-doped 93SiO2:7TiO2:20AlO1.5 glasses synthesized by the sol-gel process. Upon excitation at 583 nm (4I9/24G5/2), a bright violet up-conversion emission at 408 nm has been observed. The behavior of the up-conversion luminescence has been compared with that of the normal luminescence at both 408 and 1064 nm. The results show that while no concentration quenching for up to 2 mole Nd content is observed for the up-conversion emission, such an effect can be observed for the normal luminescence cases. Although the up-conversion luminescence has a shorter lifetime and weaker intensity, it is of use to the development of sol-gel glass-based waveguide lasers operating at the violet wavelength.

Original languageEnglish (US)
Pages (from-to)1571-1578
Number of pages8
JournalMaterials Research Bulletin
Issue number9
StatePublished - Jul 1 2000
Externally publishedYes

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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