Cold white light emission in tellurite-zinc glasses doped with Er3+-Yb3+-Tm3+ under 980 nm.
CALDERÓN, Gaston Lozano; SILVA, O. B.; FARIA, Walter José Gomes Juste; DE CAMARGO, Andrea Simone Stucchi; GONÇALVES, Rogéria Rocha; MANZANI, Danilo; BRUNA, R.; RIVERA, V. A. G.; MAREGA JÚNIOR, Euclydes.
CALDERÓN, Gaston Lozano; SILVA, O. B.; FARIA, Walter José Gomes Juste; DE CAMARGO, Andrea Simone Stucchi; GONÇALVES, Rogéria Rocha; MANZANI, Danilo; BRUNA, R.; RIVERA, V. A. G.; MAREGA JÚNIOR, Euclydes.
Abstract: Tellurite-zinc glasses doped with Er3+, Yb3+ and Tm3+ were fabricated by conventional melt-quenching technique and characterised by absorption spectroscopy, refractive index, lifetime measurements, excitation, luminescence and up-conversion spectroscopy. Tunable blue to cold white light emission based on the colour mixing of red, green and blue light was obtained via up-conversion under 980 nm and by adjusting the laser excitation intensity. The balancing of the relative intensity of each colour is provided by the energy transfer process between the rare-earth ions. Moreover, luminescence spectroscopy was performed with a 405 nm laser to further understand the energy transfer mechanism that produce the white light. The Judd-Ofelt intensity parameters (O2, O4 and O6) were calculated for all samples and present the trend O2>O4>O6. The spectroscopic parameters were computed with the Judd-Ofelt theory as well as the energy transfer micro-parameters (critical radius of interaction and energy transfer coefficient). Such results shall be used to give a comprehensive explanation for the energy transfer process between these rare earth ions.
@article={003004118,author = {CALDERÓN, Gaston Lozano; SILVA, O. B.; FARIA, Walter José Gomes Juste; DE CAMARGO, Andrea Simone Stucchi; GONÇALVES, Rogéria Rocha; MANZANI, Danilo; BRUNA, R.; RIVERA, V. A. G.; MAREGA JÚNIOR, Euclydes.},title={Cold white light emission in tellurite-zinc glasses doped with Er3+-Yb3+-Tm3+ under 980 nm},journal={Journal of Luminescence},note={v. 228, p. 117538-1-117538-10},year={2020}}