Large and Versatile Plasmonic Enhancement of Photoluminescence Using Colloidal Metallic Nanocubes

Improving phosphor photoluminescence efficiency is a key parameter to boost the performances of many optical devices. In this work, colloidal silver nanocubes, homogeneously spread on luminescent surface, have proved help both injecting and extracting light in out photoluminescent layer hence contributed significantly enhancement fluorescence. This approach has been applied two materials: well-known Y$_3$Al$_5$O$_{12}$:Ce yellow an quartz. The emission efficiency, for sol-gel derived YAG:Ce layers, increased 80\% presence optimal nanoparticle density -- whereas quartz, weakly fluorescent material, signal can be enhanced by 200-fold factor. A physical analysis based simulations shows that disorder important factor surface Ag nanoparticles crucial parameter.