On the use of Purcell factors for plasmon antennas
A.F. Koenderink
TL;DR
This paper critically examines the use of Purcell factors for plasmon antennas, demonstrating that it is not an appropriate metric for emission enhancement in such systems.
Contribution
It provides a comparison between Purcell factors and exact emission rate calculations, clarifying the limitations of Purcell factors for plasmonic resonances.
Findings
Purcell factor does not accurately predict emission enhancements in plasmon antennas.
Exact calculations show discrepancies with Purcell factor estimates.
The paper explains why Purcell factors are inadequate for plasmonic systems.
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.
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