Research Papers

Time and frequency resolved emission of molecular systems coupled to a metal nanoparticle

[+] Author Affiliations
Yuan Zhang

Humboldt-Universität zu Berlin, Institut für Physik, Newtonstraße 15, D-12489 Berlin

Yaroslav Zelinskyy

Humboldt-Universität zu Berlin, Institut für Physik, Newtonstraße 15, D-12489 Berlin

Volkhard May

Humboldt-Universität zu Berlin, Institut für Physik, Newtonstraße 15, D-12489 Berlin

J. Nanophoton. 6(1), 063533 (Dec 04, 2012). doi:10.1117/1.JNP.6.063533
History: Received September 7, 2012; Revised November 2, 2012; Accepted November 6, 2012
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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.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Yuan Zhang ; Yaroslav Zelinskyy and Volkhard May
"Time and frequency resolved emission of molecular systems coupled to a metal nanoparticle", J. Nanophoton. 6(1), 063533 (Dec 04, 2012). ; http://dx.doi.org/10.1117/1.JNP.6.063533


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