Broadband and efficient enhancement of rare-earth-ion photoluminescence in optical materials by semiconductor or metal nanoaggregates.
Enrichi F., Cattaruzza E., Gonella F., Mastantuoni G., Riello P., Trave E., Vomiero A.
Relazione su invito
VI - Fisica applicata, acceleratori e beni culturali
GSSI Ex ISEF - Aula A - Martedì 24 h 17:30 - 19:30
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The spectroscopic properties of rare-earth ions make them suitable for many optical applications. Their use is well established in phosphors for lighting, light amplifiers, lasers, spectral conversion layers, and optical biomarkers. However, major limitations are related to the small excitation cross-section and absorption spectral bandwidth, which reduce their effective implementation and use. This presentation will be focused on the sensitizing process of rare-earth ions by semiconductor or metal nanoaggregates. As examples, I will illustrate the role of silicon or silver nanoaggregates for broadband enhanced PL excitation in different rare-earth doped materials, with potential applications in photovoltaics and lighting.