The Purcell factor is the standard figure of merit for spontaneous emission enhancement in microcavities and has also been proposed to describe emission enhancements for plasmonic resonances. A comparison of quality factor, mode volume, and Purcell factor for single and coupled plasmon spheres to exact calculations of emission rates shows that a Purcell factor derived from quality factor and mode volume does not describe emission changes due to plasmon antennas.
© 2010 Optical Society of America
Original Manuscript: September 22, 2010
Manuscript Accepted: October 21, 2010
Published: December 15, 2010
A. F. Koenderink, "On the use of Purcell factors for plasmon antennas," Opt. Lett. 35, 4208-4210 (2010)