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

Yuan Zhang; Iaroslav Zelinskyi; Volkhard May

doi:10.1117/1.JNP.6.063533

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.

Citation Download Citation

Yuan Zhang, Yuan Zhang, Iaroslav Zelinskyi, Iaroslav Zelinskyi, Volkhard May, Volkhard May, } "Time and frequency resolved emission of molecular systems coupled to a metal nanoparticle," Journal of Nanophotonics 6(1), 063533 (4 December 2012). https://doi.org/10.1117/1.JNP.6.063533 . Submission:

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