Influence of Au0 metallic particles on NIR laser emission of Yb3+ ions in Li2O−HfO2−SiO2 glass ceramicPilli Pavani Koteswari Devi, Ayyagari Venkata Sekhar, Valluri Ravi Kumar, Nutalapati Venkatramaiah, Vandana Ravi Kumar and Nalluri VeeraiahEur. Phys. J. Appl. Phys., 99 (2024) 1DOI: https://doi.org/10.1051/epjap/2023230168