Dresden 2006 – wissenschaftliches Programm

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O: Oberflächenphysik

O 26: Particles and clusters I

O 26.7: Vortrag

Dienstag, 28. März 2006, 17:15–17:30, WIL A317

Spectroscopic properties of molecules in small gold-nanoparticle aggregates — •M. Ringler, S. Funk, M. Borowski, T. Soller, A. Susha, G. Raschke, T. A. Klar, and J. Feldmann — Photonics and Optoelectronics Group, Physics Department and CeNS, Ludwig-Maximilians-Universität München, Germany

Plasmonic properties of metallic nanostructures alter the spectroscopic properties of their nano-environment. Understanding and controlling this phenomenon is of utmost interest both from a fundamental point of view and with regard to sensing applications. Fluorophores attached to single gold-nanoparticles are quenched by energy transfer [1] and radiative rate suppression [2], on nano-structured metal films, enhanced fluorescence is observed [3]. We will discuss the intermediate regime of small aggregates of a few nanoparticles. We will present experimental results of their joint influence on the properties of attached or enclosed molecules.

[1] Dulkeith et al., Phys. Rev. Lett. 89, 203002 (2002)

[2] Dulkeith, Ringler et al., Nano Lett. 5, 585 (2005)

[3] Lakowicz, Anal. Biochem. 337, 171 (2005)