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Journal of Nanophotonics

Time and frequency resolved emission of molecular systems coupled to a metal nanoparticle
Author(s): Yuan Zhang; Iaroslav Zelinskyi; Volkhard May
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Paper Abstract

Time and frequency resolved emission spectra of a single molecule or a supramolecular complex (SC) placed in the vicinity of a metal nanoparticle (MNP) were computed in the framework of a novel theory. In order to focus on the subwavelength extension of the whole system, the molecule-MNP coupling was restricted to the instantaneous Coulomb-interaction. Its nonperturbative consideration achieved in a density matrix description strongly affected the photon emission but allowed to treat the coupling to transversal photons in perturbation theory. For the single molecule-MNP system a vibrational coordinate was included to describe respective effects of molecular electron-vibrational coupling. When studying an SC interacting with a MNP, intermolecular excitation energy exchange coupling and energy transfer were considered. Respective time and frequency resolved emission spectra were presented. They showed a strong enhancement when compared with the case where the MNP was absent. Furthermore, the emission offered parts of the molecular energy spectra otherwise not visible.

Paper Details

Date Published: 4 December 2012
PDF: 24 pages
J. Nanophoton. 6(1) 063533 doi: 10.1117/1.JNP.6.063533
Published in: Journal of Nanophotonics Volume 6, Issue 1
Show Author Affiliations
Yuan Zhang, Humboldt-Univ. zu Berlin (Germany)
Iaroslav Zelinskyi, Humboldt-Univ. zu Berlin (Germany)
Volkhard May, Humboldt-Univ. zu Berlin (Germany)

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