Preparation and photoluminescence enhancement of Au nanoparticles with ultra‐broad plasmonic absorption in glasses

The metal nanoparticles with ultra‐broad localized surface plasmonic resonance ( LSPR ) absorption have been widely used to enhance the up conversion luminescence ( UCL ) of rare‐earth doped nanoparticles. However, there have been no reports on the preparation of metal nanoparticles with the ultra‐broad LSPR in the glasses. In this work, the gold nanoparticles with the ultra‐broad LSPR were prepared for the first time in the rare‐earth doped...