Figure 2
From: Optically-active metastable defects in volumetric nanoplasmonic composites
Passive and active bulk nanoplasmonic materials obtained by the NanoParticle Direct Doping (NPDD) method1 that demonstrate low-temperature defect-related photoluminescence. (a) Undoped NBP glass rod. (b) NBP rod doped with erbium ions (NBP:Er3+). (c) NBP rod doped with Ag nanoparticles (NBP:nAg). (d) NBP rod co-doped with Ag nanoparticles and Er3+ ions (NBP:nAg,Er3+). (e) Scheme of NPDD, where plasmonic nanoparticles and optically active elements, such as rare earth ions, are added directly to dielectric matrices. (f) Room temperature extinction coefficient of NBP glass-based nanocomposites, which demonstrate plasmonic resonance at ca. 400 nm and Er3+ absorption lines. (g) MG1 defect-related low-temperature PL observed in NBP:nAg, and MGR1 defect-related low-temperature PL observed in NBP:nAg and NBP:nAg, Er3+ samples.
