title: Resonant excited state absorption and relaxation mechanisms in Tb3+-doped calcium aluminosilicate glasses: an investigation by thermal mirror spectroscopy.
abstract: Resonant excited state absorption (ESA) and relaxation processes in Tb(3+)-doped aluminosilicate glasses are quantitatively evaluated. A model describing the excitation steps and upconversion emission is developed and applied to interpret the results from laser-induced surface deformation using thermal mirror spectroscopy. The fluorescence quantum efficiency of level (5)D(4) was found to be close to unity and concentration independent while, for the level (5)D(3), it decreases with Tb(3+) concentration. Emission spectroscopy measurements supported these results. ESA cross sections are found to be more than three orders of magnitude higher than the ground state absorption cross section.
authors: G S
authors: GS
authors: Bianchi
authors: V S
authors: VS
authors: Zanuto
authors: F B G
authors: FB
authors: Astrath
authors: L C
authors: LC
authors: Malacarne
authors: I A A
authors: IA
authors: Terra
authors: T
authors: T
authors: Catunda
authors: L A O
authors: LA
authors: Nunes
authors: C
authors: C
authors: Jacinto
authors: L H C
authors: LH
authors: Andrade
authors: S M
authors: SM
authors: Lima
authors: M L
authors: ML
authors: Baesso
authors: N G C
authors: NG
authors: Astrath
mesh_terms: D000042:Absorption; D000538:Aluminum Silicates / Q000737:chemistry*; D002118:Calcium / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005898:Glass / Q000737:chemistry; D007909:Lenses; D008027:Light; D008422:Materials Testing / Q000295:instrumentation; D008856:Microscopy, Fluorescence / Q000295:instrumentation*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*; D013725:Terbium / Q000737:chemistry*; D013817:Thermography / Q000295:instrumentation*
chemical_list: D000538:Aluminum Silicates; D013725:Terbium; C049037:aluminosilicate; D002118:Calcium