Affiliation:
1. Zavoisky Physical-Technical Institute, Federal Research Center “Kazan Scientific Center of the Russian Academy of Sciences”,
Abstract
The upconversion NaYbF4:Er nanorods were synthesized by the hydrothermal method at the temperature of 190°C for 24 h. The luminescence spectrum exhibits intense luminescence lines in the visible and near-IR ranges under 977 nm laser diode excitation. The polarization of the upconversion luminescence of a large ensemble of nanoparticles is isotropic. Considering the pronounced rod structure of nanoparticles, the presence of several subensembles with different polarization characteristics of the luminescence was assumed.
Publisher
The Russian Academy of Sciences