TITLE

Surface plasmon enhanced Förster resonance energy transfer between the CdTe quantum dots

AUTHOR(S)
Komarala, Vamsi K.; Bradley, A. Louise; Rakovich, Yury P.; Byrne, Stephen J.; Gun’ko, Yurii K.; Rogach, Andrey L.
PUB. DATE
September 2008
SOURCE
Applied Physics Letters;9/22/2008, Vol. 93 Issue 12, p123102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Förster resonance energy transfer (FRET) between CdTe quantum dots (QDs) at nanoscale proximity to gold nanoparticle (Au NP) layers is investigated experimentally. We have observed the enhancement in the acceptor QDs’ photoluminescence lifetime intensities. The decrease in donor QDs’ exciton lifetime from 5.74 to 2.06 ns, accompanied by an increase in acceptor QDs’ exciton lifetime from 3.38 to 7.52 ns, provided evidence for enhanced FRET between the QDs near Au NPs. The Au NPs’ surface plasmon dipole fields are assisted to overcome the weak electronic coupling between the emitting (donor) and absorbing (acceptor) transition exciton dipoles in the homogeneous medium.
ACCESSION #
34647456

 

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