Multiphoton Emission Enhancement from a Single Colloidal Quantum Dot Using SiO₂-Coated Silver Nanoparticles.

ABSTRACT: The enhancement of multiphoton emission from a single colloidal nanocrystal quantum dot (NQD) interacting with a plasmonic nanostructure was investigated using SiO₂-coated silver nanoparticles (Ag/SiO₂) as the plasmonic nanostructure. Using Ag/SiO₂ with five different SiO₂ shell thicknesses, we observed modification of the emission behavior depending on the distance between the NQD and silver nanoparticle (AgNP). The single-photon emission from a single NQD converted to multiphoton emission with a shortening of the emission lifetime as the NQD-AgNP distance decreased, whereas an increase and decrease in the emission intensity were observed. From the distance-dependent results, we concluded that the probability of multiphoton emission was increase

SUBMITTER: Naiki H 

PROVIDER: S-EPMC6641084 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature