title: Quantum cutting in nanoparticles producing two green photons.
abstract: A synthetic route to nanoscale NaGdF4:Ln is presented which allows for quantum cutting based on the Gd-Er-Tb system. This shows, that cross-relaxation and other energy transfer processes necessary for multiphoton emission can be achieved in nanoparticles even if the large surface and the potentially huge amount of killer traps would suggest a lack of subsequent emission.
authors.affiliation: Inorganic Chemistry III-Materials Engineering and Characterization, Ruhr-Universität Bochum, Universitätsstr. 150, 44801 Bochum, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Lorbeer
authors.forename: A-V
authors.initials: AV
authors.lastname: Mudring