Photon antibunching from oriented semiconducting polymer nanostructures.
Fluorescence intensity correlation measurements reveal that z-oriented nanostructures from single chains of a cyano-substituted polyphenylene vinylene (CN-PPV) polymer act as single-quantum emitters. Photon antibunching is observed for the first time on individual polymer nanostructures with a modulation depth exceeding 90%, providing definitive proof that radiative recombination of molecular excitons occurs at a single localized site within the folded polymer chain.
Kumar
Pradeep
P
Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, USA.
Lee
Tae-Hee
TH
Mehta
Adosh
A
Sumpter
Bobby G
BG
Dickson
Robert M
RM
Barnes
Michael D
MD