Enhanced Biexciton Emission From Quantum Dots Near Plasmonic Nanostructures

Jing Zhao
Tuesday, October 25, 2016 - 4:30pm to 5:30pm

Metal and semiconductor quantum dots (QDs) exhibit unique size and composition dependent optical properties. The key elements that determine their optical properties are localized surface plasmons in metal nanoparticles and excitons in quantum dots. When QDs are placed near Au@SiO2 core@shell nanoparticles, their exciton/multiexciton emission lifetimes and quantum yields are modified due to the exciton-plasmon interaction. At the single QD level, we found that the ratio between the biexciton and exciton quantum yields of the QDs...