Surface-plasmon-enhanced frequency upconversion in Pr3+ doped tellurium-oxide glasses containing silver nanoparticles

Abstract

A frequency upconversion process in Pr 3+ doped TeO 2 -ZnO glasses containing silver nanoparticles is studied under excitation with a nanosecond laser operating at 590 nm, in resonance with the 3 H 4 → 1 D 2 transition. The excited Pr 3+ ions exchange energy in the presence of the nanoparticles, originating efficient conversion from orange to blue. The enhancement in the intensity of the luminescence at ϳ482 nm, corresponding to the 3 P 0 → 3 H 4 transition, is due to the influence of the large local field on the Pr 3+ ions, which are located near the metallic nanoparticles.

Enhancement of Pr3+ luminescence in TeO2–ZnO–Nb2O5–MoO3 glasses containing silver nanoparticles

“…10 shows the schematic energy level diagram of the observed upconversion emission bands with 586 nm excitation wavelength. This process was already observed in other glassy systems and vitreous ceramics, which was attributed to an energy exchange process involving a pair of Pr 3+ ions [24]. Accordingly, two ions initially excited to level 1 D 2 exchange energy in such a way that one ion is promoted to the [ 3 P J (J = 0, 1, 2) , 1 I 6 ] manifold, while the other nonradiatively decays to lower energy levels.…”

“…Recently, UC luminescence in Pr 3+ doped TeO 2 -ZnO glasses containing Ag nanoparticles was also reported. Silver or gold nanoparticles (SNPs) show remarkable optical properties that depend on their size and shape [24][25][26][27][28][29][30]. Recently, the tellurite glass composition TeO 2 -ZnO-Nb 2 O 5 -MoO 3 has been identified [31] to have superior optical properties such as 3 , Raman susceptibility and Raman amplification bandwidth to the existing tellurite glasses.…”

Enhanced infrared to visible upconversion emission in Er3+ doped phosphate glass: Role of silver nanoparticles

“…Interestingly, the local field effect due to the presence of metallic NPs around the luminescent rare-earth ions possibly because of which the non-linear properties enhance needs more systematic experimental investigation. Despite considerable research efforts, the role played by the embedded silver NPs in the erbium doped phosphate glass in enhancing the optical properties is far from being understood [25][26][27][28] and requires further attention.…”

Enhanced luminescence of Tb3+/Eu3+ doped tellurium oxide glass containing silver nanostructures

“…[1][2][3]7,8,13 Recently nucleation of metallic nanoparticles ͑NPs͒ inside tellurium oxide glasses was reported. [14][15][16][17][18] In all cases studied the presence of NPs contributes to enhance the material's luminescence efficiency either due to ET from the NPs to the RE ions or by influence of the large local field on the RE ions positioned in the vicinity of the NPs. Indeed the presence of silver nanostructures in TeO 2 -PbO-GeO 2 In this work we present the first luminescence study of Tb 3+ / Eu 3+ doped TeO 2 -ZnO-Na 2 O -PbO glass containing silver NPs.…”