Frequency upconversion properties of Ag: TeO2-ZnO nanocomposites codoped with Yb3+ and Tm3+ ions

被引：24

作者：

Kassab, L. R. P. ^{[2
]}

Freitas, L. F. ^{[2
]}

Assumpcao, T. A. A. ^{[3
]}

da Silva, D. M. ^{[3
]}

de Araujo, C. B. ^{[1
]}

机构：

[1] Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE, Brazil

[2] Fac Tecnol Sao Paulo FATEC SP, Lab Vidros & Datacao, BR-01124060 Sao Paulo, Brazil

[3] Univ Sao Paulo, Escola Politecn, Dept Engn Sistemas Eletron, BR-05508900 Sao Paulo, Brazil

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2011年 / 104卷 / 04期

关键词：

OPTICAL-PROPERTIES; SILVER PARTICLES; FLUORESCENCE; LUMINESCENCE; ENHANCEMENT; GLASSES; GOLD; EMISSION; EU3+;

D O I：

10.1007/s00340-011-4451-1

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Yb3+-Tm3+ codoped tellurite glasses containing silver nanoparticles (NPs) were synthesized and characterized using transmission electron microscopy and optical techniques. The samples' composition and the nucleation of NPs were investigated using electron diffraction and energy dispersive spectroscopy. For the optical experiments, the samples were excited using a diode laser operating at 980 nm, in resonance with the Yb3+ transition F-2(7/2) -> F-2(5/2). Photoluminescence (PL) bands corresponding to Tm3+ transitions were observed at 480, 650, and 800 nm due to the Yb3+ -> Tm3+ energy transfer. PL enhancement was achieved by heat-treatment of the samples at 325 degrees C during different time intervals. The growth of the PL bands correlates with the increase of the silver NPs concentration. The relevant mechanisms contributing for the PL characteristics are discussed.

引用

页码：1029 / 1034

页数：6