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Tailoring and enhancing spontaneous two-photon emission using resonant plasmonic nanostructures

Research output: Contribution to journalArticle

Alexander N. Poddubny, Pavel Ginzburg, Pavel A. Belov, Anatoly V. Zayats, Yuri S. Kivshar

Original languageEnglish
Article number033826
Pages (from-to)-
Number of pages5
JournalPhysical Review A (Atomic, Molecular and Optical Physics)
Volume86
Issue number3
DOIs
Publication statusPublished - 20 Sep 2012

King's Authors

Abstract

The rate of spontaneous emission is known to depend on the environment of a emitter, and the enhancement of one-photon emission in a resonant cavity is known as the Purcell effect. Here we develop a theory of spontaneous two-photon emission for a general electromagnetic environment including inhomogeneous dispersive and absorptive media. This theory is used to evaluate the two-photon Purcell enhancement in the vicinity of metallic nanoparticles and demonstrates that the surface-plasmon resonances supported by these particles can increase the emission rate by more than two orders of magnitude. The control over two-photon Purcell enhancement given by tailored nanostructured environments could provide an emitter with any desired spectral response and may serve as an ultimate route for designing light sources with novel properties.

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