Enhancement of dual-broadband NIR emissions in Ag NPs embedded tellurite glass doped with Er3+/Tm3+/Ho3+ ions |
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| Authors: | LI Chengyan DING Jiale XIA Lizhang ZHANG Yu and ZHOU Yaxun |
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| Affiliation: | College of Information Science and Engineering, Ningbo University, Ningbo 315211, China,College of Information Science and Engineering, Ningbo University, Ningbo 315211, China,College of Information Science and Engineering, Ningbo University, Ningbo 315211, China,College of Information Science and Engineering, Ningbo University, Ningbo 315211, China and College of Information Science and Engineering, Ningbo University, Ningbo 315211, China |
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| Abstract: | Tellurite glasses combined with metal silver nanoparticles (Ag NPs) and Er3+/Tm3+/Ho3+ ions were synthesized using melting and quenching technique, and the enhanced two-band near-infrared (NIR) fluorescence induced by Ag NPs was reported. Upon the excitation of 808 nm laser diode (LD), dual-broadband and flat NIR fluorescence ranging from 1 350 nm to 1 600 nm and from 1 600 nm to 2 200 nm with full width at half maximum (FWHM) of 154 nm and 374 nm respectively in Ag NPs embedded tellurite glass doped with appropriate concentrations of Er3+/Tm3+/Ho3+ ions has an obvious enhancement of about 40% with respect to the glass sample without Ag NPs, which is attributed to the local field effect caused by Ag NPs and energy transfer from Ag species to rare-earth ions. The enhanced dual-broadband and flat NIR fluorescence enables us to develop various NIR band photonic devices flexibly. |
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