Ultrafast upconversion superfluorescence with a sub-2.5 ns lifetime at room temperature.

ABSTRACT: Photon upconversion through lanthanide-doped nanoparticles is of great significance for various applications. However, the current development of upconversion nanoparticles is hindered by the low quantum efficiency and long radiative lifetimes of lanthanide ions, restricting their applications in time-dependent nanophotonics. Herein, we report ultrafast upconversion superfluorescence with a lifetime of sub-2.5 ns in lanthanide-doped nanoparticles at room temperature. Upon excitation with an 800-nm fs-pulsed laser, we achieve a large number (N = 912) of correlated dipoles in Nd³⁺-concentrated nanoparticles, resulting in collective coherent emission with two orders of magnitude amplification in intensity and more than three orders of magnitude improvement in the radiative decay ra

SUBMITTER: Zhou M 

PROVIDER: S-EPMC11564658 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature