Fluorescence enhancement and energy transfer in apertureless scanning near-field optical microscopy

F M Huang, F Festy, D R Richards

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

We investigate the mechanisms for fluorescence enhancement and energy transfer near a gold tip in apertureless scanning near-field optical microscopy. Using a simple quasi-static model, we show that the observed enhancement of fluorescence results from competition between enhancement and quenching, and is dependent on a range of experimental parameters. We find good qualitative agreement with the results of measurements of the effect of both sharp and blunt tips on quantum dot fluorescence, and provide a demonstration of tip-enhanced fluorescence imaging with 60 nm resolution.
Original languageEnglish
Pages (from-to)S234 - S238
JournalJOURNAL OF OPTICS A PURE AND APPLIED OPTICS
Volume8
Issue number4
DOIs
Publication statusPublished - 1 Apr 2006

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