A suitable (wide-range plus linear) temperature sensor based on Tm3+ ions

Autor(es)

Zanatta, A. R. ^[1] ; Scoca, D. ^[2] ; Alvarez, F. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SCIENTIFIC REPORTS; v. 7, OCT 26 2017.
• Citações Web of Science: 4

Resumo

Future advances in the broad fields of photonics, (nano-) electronics or even theranostics rely, in part, on the precise determination and control, with high sensitivity and speed, of the temperature of very well-defined spatial regions. Ideally, these temperature-sensors (T-sensors) should produce minimum (or no) disturbance in the probed regions, as well as to exhibit good resolution and significant dynamic range. Most of these features are consistent with the sharp and distinctive optical transitions of trivalent rare-earth (RE3+) ions that, additionally, are susceptible to their local environment and conditions. Altogether, these aspects form the basis of the present work, in which we propose a new T-sensor involving the light emission of trivalent thulium ions (Tm3+) embedded into crystalline TiO2. The optical characterization of the TiO2: Tm3+ system indicated a Tm3+-related emission at similar to 676 nm whose main spectral features are: (1) a temperature-induced wavelength shift of -2.2 pm K-1, (2) a rather small line-width increase over the similar to 85-750 K range, and (3) minimum data deconvolution-processing. The study also included the experimental data of the well-established pressure-and T-sensor ruby (Al2O3:Cr3+) and a comprehensive discussion concerning the identification and the excitation-recombination mechanisms of the Tm3+-related transitions. (AU)

• Processo FAPESP: 12/10127-5 - Pesquisa e desenvolvimento de materiais nanoestruturados para aplicações eletrônicas e de física de superfícies
• Beneficiário: Fernando Alvarez
• Linha de fomento: Auxílio à Pesquisa - Temático