META Conference, META'12

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Tunable plasmon resonance modes on gold nanoparticles Er3+-doped germanium-tellurite glass
Victor Anthony Garcia Rivera, Yannick Ledemi, Sergio Osorio, Danilo Manzani, Fabio Aparecido Ferri, Sidney J.L. Ribeiro, Luiz A.O. Nunes, Euclydes Jr. Marega

Last modified: 2012-01-03

Abstract


The plasmon resonance modes of gold nanoparticles embedded in an erbium doped germanium-tellurite glass are activated using laser lines at 808 and 480 nm in resonance with radiative transitions of Er3+ ions. The gold nanoparticles were grown within the host glass by thermal annealing at several times, leading to diameters lower than 1.6 nm. The resonance wavelengths determined theoretically and experimentally are 770 and 800 nm, respectively. The absorption wavelength of nanoparticles was determined by using the Frohlich condition. Gold nanoparticles provide tunable emission resulting in a large enhancement for the 2H11/24I13/2 (emission at 805 nm) and 4S3/24I13/2 (emission at 840 nm) electronic transitions of Er3+ ions, this is associate with the quantum yield of the energy transfer transition. We observed that up-conversion is favored by the excited-state absorption due to the presence of the gold nanoparticles coupled with the Er3+ ions within the glass matrix.


Keywords


gold nanoparticles, tellurite glass, Er3+ ions