We study the spontaneous decay rate of a dipole emitter close to a metallic nanoparticle in the extreme near-field regime. The metal is modeled using a nonlocal dielectric function that accounts for the microscopic length scales of the free electron gas. We describe quantitatively the crossover between the macroscopic and microscopic regimes and the enhanced nonradiative decay due to microscopic interactions. Our theory is in agreement with results previously established in the asymptotic near- and far-field regimes.
© 2010 Optical Society of America
Original Manuscript: October 20, 2009
Revised Manuscript: December 10, 2009
Manuscript Accepted: December 21, 2009
Published: January 22, 2010
Vol. 5, Iss. 4 Virtual Journal for Biomedical Optics
E. Castanié, M. Boffety, and R. Carminati, "Fluorescence quenching by a metal nanoparticle in the extreme near-field regime," Opt. Lett. 35, 291-293 (2010)