Enhancement of 1.5 µm fluorescence signal from Er3+ due to Yb3+ in yttrium silicate powders pumped at 975 and 808 nm.
Methods Appl Fluoresc
; 7(1): 015003, 2018 Nov 02.
Article
em En
| MEDLINE
| ID: mdl-30256766
The effect of the presence of ytterbium (Yb3+) on the near-infrared (NIR) emission profile of erbium (Er3+), more specifically the 4I13/2 â 4I15/2 radiative transition around 1.5 µm, in yttrium silicate crystalline ceramic powders prepared by combustion synthesis was investigated under different NIR laser excitation wavelengths (λ = 808 and 975 nm). Enhancement of fluorescence around 1.5 µm due to the presence of Yb3+ was observed, which has potential use in medicine (NIR-III biological window) and optical communications (C-band transmission window). Two different excitation channels involving energy transfer between Er3+ and Yb3+ were studied: one involving the sensitization of Er3+ by Yb3+ (for λ = 975 nm laser light excitation) and the other involving direct excitation of Er3+ with Yb3+ acting as an energy reservoir (for λ = 808 nm laser light excitation). The energy transfer mechanisms of both processes are discussed in the text.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Methods Appl Fluoresc
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Reino Unido