Regensburg 2004 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 12: Poster I

HL 12.22: Poster

Montag, 8. März 2004, 16:30–19:00, Poster A

Molecular fluorescence in and near nanostructures — •Carsten Henkel², Lavinia Rogobete¹, and Vahid Sandoghdar¹ — ¹Physical Chemistry, ETH Zurich, Switzerland — ²Institut für Physik, Universität Potsdam

Single molecular dipoles provide unique opportunities to perform scanning optical near field microscopy with pointlike sources and detectors. The electromagnetic interaction with nanostructured probes and with the scanning tip itself significantly modifies the fluorescence dynamics. We discuss a simplified, two-dimensional model for the radiative decay of a single dipole in a complex dielectric or metallic environment [1]. The electromagnetic fields are computed numerically using boundary integral equations. The resulting decay rates inside sub-wavelength host particles compare well with an electrostatic calculation.

[1] Opt. Lett. 28 (2003) 1736.