We perform time-resolved fluorescence spectroscopy on clusters of plasmonic nanoantennas covered with a dye-polymer mixture. Dimer antenna structures were fabricated consisting of two interacting gold nanorods with varying lengths and interparticle separation, By combining four individual antennas into a cluster within a diffraction limited spot size, we can couple out half of the dye molecule fluorescence via antenna plasmons. Two-dimensional confocal fluorescence lifetime scans visualize the spontaneous emission enhancement of the molecular fluorescence around the antenna clusters.

Mater. Sci. Eng. B

Muskens, O. L., & Gómez Rivas, J. (2008). Enhanced light extraction from emitters close to clusters of resonant plasmonic nanoantennas. Mater. Sci. Eng. B, 149, 216–219. doi:10.1016/j.mseb.2007.10.021