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Phys Rev Lett. 2006 Dec 31;97(26):266808. Epub 2006 Dec 29.

Strong coupling between localized plasmons and organic excitons in metal nanovoids.

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School of Physics and Astronomy, University of Southampton, Highfield, Southampton, SO17 1BJ, United Kingdom.


Hybrid emitting exciton-plasmonic composites are constructed by coating arrays of spherical nanovoids embedded in a gold film with organic semiconducting molecular J-aggregate films. In such plasmonic crystals, localized plasmons confined inside the voids can be excited. We report the first observation of polaritonic spectral narrowing and strong coupling between localized plasmons and J-aggregate excitons with Rabi splittings of 230 meV at room temperature.

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