Regensburg 2007 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 26: INTERNAL SYMPOSIUM Optical Spectroscopy I

CPP 26.1: Invited Talk

Thursday, March 29, 2007, 10:00–10:30, H40

Efficient coupling of single molecules with light — •Vahid Sandoghdar — Laboratory of Physical Chemistry, ETH Zurich, CH-8093 Zurich, Switzerland, www.nano-optics.ethz.ch

We examine the coherent interaction of strongly confined light with a single molecule at cryo-genic temperatures [1, 2, 3] and show that a single molecule can leave a fingerprint larger than 10% on a laser beam. Furthermore, we discuss experiments and theoretical calculations for enhancing the coupling between a single molecule and light. We show how a single spherical gold nanoparticle can act as a nano-antenna to modify the excitation, radiation and dissipation processes of a single molecule by more than an order of magnitude [4] and provide guidelines for designing more complex antenna structures that result in even larger effects [5]. [1] I. Gerhardt, G. Wrigge, P. Bushev, G. Zumofen, M. Agio, R. Pfab, V. Sandoghdar, to appear in Phys. Rev. Lett. [2] I. Gerhardt, G. Wrigge, M. Agio, P. Bushev. G. Zumofen, V. Sandoghdar, submitted. [3] G. Wrigge, I. Gerhardt, J. Hwang, V. Sandoghdar, in preparation. [4] S. Kühn, U. Hakanson, L. Rogobete, V. Sandoghdar, Phys. Rev. Lett. 97, 017402 (2006). [5] L. Rogobete, F. Kaminski, M. Agio, V. Sandoghdar, in preparation.