Enhanced ultra-wide NIR fluorescence in tellurite glass doped with Er3+-Tm3+-Nd3+-Ag NPs.
Spectrochim Acta A Mol Biomol Spectrosc
; 261: 120075, 2021 Nov 15.
Article
in En
| MEDLINE
| ID: mdl-34153548
ABSTRACT
Tellurite glasses with combination of Er3+/Tm3+/Nd3+ ions and silver nanoparticles (Ag NPs) were prepared by using single-step melt-quenching technology, and the enhanced effect of Ag NPs on the ultra-broadband near-infrared (NIR) fluorescence was studied. Under the 808 nm LD excitation, two ultra-broadband NIR fluorescence of 1300-1600 nm and 1600-2100 nm underwent an obvious enhancement of about 52% compared to the tri-doping tellurite glass free of Ag NPs. The intensified local electric field induced by Ag NPs together with the energy transfer from Ag species to doped ions is responsible for this enhancement. The enhanced ultra-broadband NIR fluorescence of 1300-1600 nm with the full width at half maximum (FWHM) of 230 nm, originating from the spectral overlapping of 1.34 µm (4F3/2â4I13/2 of Nd3+), 1.47 µm (3H4â3F4 of Tm3+) and 1.53 µm (4I13/2â4I15/2 of Er3+) three bands, is promising in developing new ultra-broadband photonic devices such as fiber amplifiers and tunable lasers.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Silver
/
Metal Nanoparticles
Language:
En
Journal:
Spectrochim Acta A Mol Biomol Spectrosc
Journal subject:
BIOLOGIA MOLECULAR
Year:
2021
Document type:
Article
Affiliation country:
China