On the use of Purcell factors for plasmon antennas

Abstract

The Purcell factor is the standard figure of merit for spontaneous emission enhancement in microcavities, that has also been proposed to describe emission enhancements for plasmonic resonances. A comparison is made of quality factor, mode volume and Purcell factor for single and coupled plasmon spheres to exact calculations of emission rates. The paper explains why the Purcell factor is not appropriate for plasmon antennas.

3 pages, 2 figures

References in corpus (1)

• On-command enhancement of single molecule fluorescence using a gold nanoparticle as an optical nano-antenna

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