Department of Applied Physics;
The Hong Kong Polytechnic University;
Hong Kong;
China;
Key Laboratory of Optoelectronic Materials Chemistry and Physics;
Fujian Institute of Research on the Structure of Matter;
Chinese Academy of Sciences;
Fuzhou;
Fujian 350002;
China;
Central European Institute of Technology;
Brno University of Technology;
Brno 61669;
Czech Republic;
Department of Chemistry;
Hong Kong Baptist University;
Hong Kong;
China;
Förster resonance energy transfer; gold nanorods; lanthanide-doped upconversion nanocrystals; plasmon-enhanced nonlinear fluorescence; polarization modulation;