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Journal Article

Coherent interaction of single molecules and plasmonic nanowires


Wrachtrup,  J.
Max Planck Society;

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Gerhardt, I., Grotz, B., Siyushev, P., & Wrachtrup, J. (2017). Coherent interaction of single molecules and plasmonic nanowires. International Journal of Modern Physics B, 31(24): 1740004.

Cite as: https://hdl.handle.net/21.11116/0000-000E-D3CC-E
Quantum plasmonics opens the option to integrate complex quantum optical circuitry onto chip scale devices. In the past, often external light sources were used and nonclassical light was coupled in and out of plasmonic structures, such as hole arrays or waveguide structures. Another option to launch single plasmonic excitations is the coupling of single emitters in the direct proximity of, e.g., a silver or gold nanostructure. Here, we present our attempts to integrate the research of single emitters with wet-chemically grown silver nanowires. The emitters of choice are single organic dye molecules under cryogenic conditions, which are known to act as high-brightness and extremely narrow band single photon sources. Another advantage is their high optical nonlinearity, such that they might mediate photon photon interactions on the nanoscale. We report on the coupling of a single molecule fluorescence emission through the wire over the length of several wavelengths. The transmission of coherently emitted photons is proven by an extinction type experiment. As for influencing the spectral properties of a single emitter, we are able to show a remote change of the line-width of a single terrylene molecule, which is in close proximity to the nanowire.