Silver nanoparticles enhanced luminescence properties of Er3+ doped tellurite glasses: Effect of heat treatment

Abstract

Articles you may be interested inEnergy transfer characteristics of silicate glass doped with Er3+, Tm3+, and Ho3+ for 2μm emission Tellurite glasses doped Er 3þ ions and containing Silver nanoparticles (Ag NPs) are prepared using melt quenching technique. The nucleation and growth of Ag NPs were controlled by a thermal annealing process. The X-ray diffraction pattern shows no sharp peak indicating an amorphous nature of the glasses. The presence of Ag NPs is confirmed from transmission electron microscopy micrograph. Absorption spectra show typical surface plasmon resonance (SPR) band of Ag NPs within the 510-550 nm range in addition to the distinctive absorption peaks of Er 3þ ions. The Judd-Ofelt (J-O) intensity parameters, oscillator strengths, spontaneous transition probabilities, branching ratios, and radiative lifetimes were successfully calculated based on the experimental absorption spectrum and the J-O theory. It was found that the presence of silver NPs nucleated and grown during the heat annealing process improves both of the photoluminescence (PL) intensity and the PL lifetime relative to the 4 I 13/2 ! 4 I 15/2 transition. Optimum PL enhancement was obtained after 10 h of heat-treatment. Such enhancements are mainly attributed to the strong local electric field induced by SPR of silver NPs and also to energy transfer from the surface of silver NPs to Er 3þ ions, whereas the quenching is ascribed to the energy transfer from Er 3þ ions to silver NPs. Using the Mc Cumber method, absorption cross-section, calculated emission cross-section, and gain cross-section for the 4 I 13/2 ! 4 I 15/2 transition were determined and compared for the doped and co-doped glasses. The present results indicate that the glass heat-treated for 10 h has good prospect as a gain medium applied for 1.53 lm band broad and high-gain erbium-doped fiber amplifiers. V C 2014 AIP Publishing LLC. [http://dx.

Enhanced luminescence from silver nanoparticles integrated Er3+-doped boro-tellurite glasses: Impact of annealing temperature

“…This fact affirms that more Er cations get dissolve in the glass matrix and diminishes the distance between adjacent Er cations. This in turn increases the repulsive force between neighboring Er cations and therefore enhances Ω 6 [43]. The observed AT dependent variation in J-O intensity parameters in the present glasses are attributed to the site-to-site variation, modification in asymmetry around erbium ions and alteration of glass rigidity.…”

“…parameter Ω 4 has an effect on some transitions of Er 3+ together with Ω 6 , such as the 4 I 13/2 → 4 I 15/2 transition [43]. According to Jacobs and Weber theory [44] the erbium emission intensity can be characterized uniquely by Ω 4 and Ω 6 parameters.…”

Heat Treatment Effect on Eu3+ Doped TeO2-BaO-Bi2O3 Glass Systems with Ag Nanoparticles

“…Silver LSPR peak has been observed above 500 nm in [22,34]. In tellurite matrix with its refractive index of approximately 2, LSPR band shifts to higher wavelengths in comparison to silicate glasses [20].…”

Enhanced 1.53μm band fluorescence in Er3+/Ce3+ codoped tellurite glasses containing Ag NPs

“…In order to avoid such concentration quenching, keeping a moderate RE doped level meanwhile introducing the metallic Au or Ag nanoparticles (NPs), which can greatly enhance RE ions radiative transitions, has been proposed in recent years [17,18]. As reported, a large enhancement in luminescence intensities of Er 3+ -doped [19,20], Eu 3+ -doped [21,22], Nd 3+ -doped [23,24] glasses containing metallic NPs, for example, are observed owing to the enhanced localized field around the RE ions as well as the possible energy transfer from the metallic NPs to RE ions [25,26]. The metallic NPs are obtained by means of reduction of Ag ions (Ag + ?…”