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

Fu Min Huang, David Richards, Fumin Huang

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13 Citations (Scopus)


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
Number of pages5
JournalJournal of Optics A: Pure and Applied Optics
Issue number4
Publication statusPublished - Apr 2006

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