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Proceedings Paper

Purcell factor of metallic nanoresonators
Author(s): C. Sauvan; J.-P. Hugonin; I. S. Maksymov; P. Lalanne
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Paper Abstract

The spontaneous emission of a quantum emitter depends on its environment. This fundamental effect of quantum electrodynamics has become a cornerstone of nano-optics, with the objective to control light absorption and emission at the nanometer scale. At the heart of the effect lies the emitter-cavity coupling. An important figure of merit is the famous Q/V ratio introduced by Purcell in 1946 and largely used by the photonic-crystal community over the last decennia, with Q the quality factor of the cavity and V the mode volume. Here we revisit the classical problem of field coupling between quantum emitters and cavities to encompass the important case of metallic nanoresonators. We propose a generalized Purcell formula, which substantially differs from the classical one and which is capable of accurately handling cavity modes with strong radiative leakage, absorption and material dispersion. Fully-vectorial numerical calculations obtained for distinct nanocavity constructs representative of modern studies in nanophotonics provide a strong support to our theory.

Paper Details

Date Published: 14 March 2013
PDF: 11 pages
Proc. SPIE 8623, Ultrafast Phenomena and Nanophotonics XVII, 86230W (14 March 2013); doi: 10.1117/12.2002954
Show Author Affiliations
C. Sauvan, Lab. Photonique, Numérique et Nanosciences, CNRS, Univ. Bordeaux 1 (France)
J.-P. Hugonin, Lab. Charles Fabry, CNRS, Univ. Paris-Sud (France)
I. S. Maksymov, Lab. Charles Fabry, CNRS, Univ. Paris-Sud (France)
P. Lalanne, Lab. Photonique, Numérique et Nanosciences, CNRS, Univ. Bordeaux 1 (France)

Published in SPIE Proceedings Vol. 8623:
Ultrafast Phenomena and Nanophotonics XVII
Markus Betz; Abdulhakem Y. Elezzabi; Jin-Joo Song; Kong-Thon Tsen, Editor(s)

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