Tip-enhanced fluorescence imaging of quantum dots

F M Huang, F Festy, D Richards

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

We have imaged the fluorescence from a single quantum dot cluster using an apertureless scanning near-field optical microscope. When a sharp gold tip is brought within a few nanometers from the sample surface, the resulting enhancement in quantum dot fluorescence in the vicinity of the tip leads to a resolution of about 60 nm. We determine this enhancement of the fluorescence to be about fourfold in magnitude, which is consistent with the value expected as a result of competition between fluorescence quenching and electromagnetic field enhancement. (C) 2005 American Institute of Physics.

Original languageEnglish
Article number183101
Pages (from-to)-
Number of pages3
JournalApplied Physics Letters
Volume87
Issue number18
DOIs
Publication statusPublished - 31 Oct 2005

Cite this