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Abstract: Confining a laser field between two high reflectivity mirrors of ahigh-finesse cavity can increase the probability of a given cavity photon to bescattered by an atom traversing the confined photon mode. This enhancedcoupling between light and atoms is successfully employed in cavity quantumelectrodynamics experiments and led to a very prolific research in quantumoptics. The idea of extending such experiments to sub-wavelength sizednanomechanical systems has been recently proposed in the context of opticalcavity cooling. Here we present an experiment involving a single nanorodconsisting of about 10^9 atoms precisely positioned to plunge into the confinedmode of a miniature high finesse Fabry-Perot cavity. We show that the opticaltransmission of the cavity is affected not only by the static position of thenanorod but also by its vibrational fluctuation. While an imprint of thevibration dynamics is directly detected in the optical transmission,back-action of the light field is also anticipated to quench the nanorodBrownian motion. This experiment shows the first step towards optical cavitycontrolled dynamics of mechanical nanostructures and opens up new perspectivesfor sensing and manipulation of optomechanical nanosystems.

Author: I. Favero, S. Stapfner, D. Hunger, P. Paulitschke, J. Reichel, H. Lorenz, E. M. Weig, K. Karrai

Source: https://arxiv.org/

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