Latest paper published : emission and excitation enhancements in single gold nanoapertures

14 Mars 2008 , Rédigé par JW Publié dans #Recent research work

Released in the march 03rd issue of Optics Express : we detail the role of single nanometric apertures milled in a gold film to enhance the fluorescence emission of Alexa Fluor 647 molecules. By “detailing”, we mean we characterise the effects of the nanoaperture both on the excitation and emission phenomena that form the fluorescence process.  

The major novelty in this study is the introduction of a fluorescence characterization procedure combining fluorescence correlation spectroscopy and fluorescence lifetime measurements.

For the first time, we characterize a broad range of nanoaperture diameters from 80 to 310 nm. This allows us to highlight the link between the fluorescence enhancement and the local photonic density of states.  

These results are of great interest to increase the effectiveness of fluorescence-based single molecule detection and to understand the interaction between a quantum emitter and a nanometric metal structure.

Freely available for download :  http://www.opticsexpress.org/abstract.cfm?id=154338

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