This work presents the optical properties of erbium‐doped and erbium/ytterbium codoped Na 2 O–Al 2 O 3 –TiO 2 –Nb 2 O 5 –P 2 O 5 glass systems and also the characterization of planar waveguides obtained by typical thermally assisted Ag + ↔Na + ion‐exchange process. The glass systems allow the preparation of single mode and multimode planar waveguides presenting a strong and relatively broad emission at 1536 nm. The emission signal in the infrared region is intensified for silver‐containing samples when compared with free‐silver samples. The emission signal intensification may be attributed to a nonplasmonic energy transfer from silver species to Er 3+ ions as no bands related to surface plasmon resonance (SPR) of silver nanoparticles were observed.
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Bozelli et al. (2010) studied this question.
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