Single-molecule optical switching of terrylene in p-terphenyl

F. Kulzer, S. Kummer, R. Matzke, C. Bräuchle and Th. Basche´
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F. Kulzer: Institut für Physikalische Chemie, Universität München
S. Kummer: Institut für Physikalische Chemie, Universität München
R. Matzke: Institut für Physikalische Chemie, Universität München
C. Bräuchle: Institut für Physikalische Chemie, Universität München
Th. Basche´: *Institut für Physikalische Chemie, Johannes-Gutenberg-Universität

Nature, 1997, vol. 387, issue 6634, 688-691

Abstract: Abstract The controlled manipulation and switching of single atoms and molecules raise the prospect of ultra-high-density data storage. Switching by motion of a single atom has been reported1, and techniques of single-molecule optical detection and spectroscopy2 in the condensed phase have been refined to a degree that allows the modification of the absorption properties of a single chromophore3. Light-induced jumps in single-molecule excitation frequencies have been reported3,4,5, but in none of these cases could the process be controlled: the jumps varied from molecule to molecule, they were interrupted by spontaneous jumps, and the new excitation frequencies could not be identified unambiguously. Here we report light-induced reversible frequency jumps ofsingle molecules of the aromatic hydrocarbon terrylene embedded in a particular site of a p-terphenyl host crystal6 at temperatures of around 2 K. The changes in absorption frequency for different terrylene molecules were identical (within 0.5%) for all samples studied. Thus we were able to switch single-molecule absorption lines in a controlled way between well-defined frequency positions.

Date: 1997
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DOI: 10.1038/42674

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