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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 8: Poster: Nanoparticles and Composite Materials

CPP 8.39: Poster

Montag, 26. März 2012, 17:30–20:00, Poster A

Density Matrix Description of Molecule Metal Nanoparticle Interactions — •Gerold Kyas, Yaroslav Zelinskyy, Yuan Zhang, and Volkhard May — Institut für Physik, Humboldt-Universität zu Berlin, Germany

Within the emerging field of plasmonics, particular efforts are undertaken to gain a fundamental insight into the interaction between molecules and metal nanoparticles (MNPs). Recent experimental and theoretical studies demonstrated a versatile enhancement effect of the metal supporting various molecular processes, such as light absorption, emission and intermolecular charge and energy transfer. In our approach, we describe these phenomena via a density matrix based microscopic theory, which, in contrast to the proposals made in other works, is fully quantum mechanical and hence free of the need to calculate local electric fields.

As an application, we present a consideration of MNP affected intermolecular excitation energy transfer [1]. Moreover, the emission and absorption spectra of molecular complexes placed in close vicinity to an MNP are discussed [2]. Finally, we briefly comment on plasmon assisted charge transmission through a molecular junction.

[1] G. Kyas and V. May, J. Chem. Phys. 134, 034701 (2011).

[2] Ya. R. Zelinskyy and V. May, Chem. Phys. Lett. 511, 372 (2011).