This paper reports the synthesis and a detailed analysis of the luminescence properties of Nd3+ doped LiNbO3 and LiTaO3 powders prepared by sol-gel process. The two ferroelectric hosts are potential candidates for various electronic and photonics applications. Near IR emission transitions of Nd3+ at 890 nm, 1060 nm and 1340 nm have been measured under the excitation of an Ar+ laser and it has been found that the 2mol percent Nd3+ has an intense emission compared with the other contents. An up-conversion violet color emission has also been observed with a 583 nm excitation, which is a hypersensitive transition of Nd3+ having a strong absorption at the yellow wavelength. Apart form a bright violet up-conversion emission, three other emissions at 342 nm and 464 nm have also been measured. The violet up- conversion emissions have been explained using an energy level diagram. The structural details and particle sizes of Nd3+ doped LiNbO3 and LiTaO3 powders have been studied form the patterns of XRD and SEM images.
[1]
W. Brocklesby,et al.
Fabrication, spectroscopy and laser performance of Nd 3+-doped lead-silicate glass fibers
,
1995
.
[2]
Mohamed Bouazaoui,et al.
Fluorescence properties of sol-gel derived Er3+:SiO2GeO2 planar waveguides
,
1997
.
[3]
C. Prieto.
Influence of lithium niobate stoichiometry on the lattice position of Nd3+ in Nd:LiNbO3
,
1999
.
[4]
Yee Loy Lam,et al.
Thin films of LiNbO3 prepared on SiO2 /Si by sol-gel processing for active SOS device applications
,
1998,
Other Conferences.
[5]
C. H. Kam,et al.
Fluorescence properties of Er3+;LiNbO3 sol-gel powder
,
2000
.