Coherent coupling between surface plasmons and excitons in semiconductor nanocrystals

Details Coherent coupling between surface plasmons and excitons in semiconductor nanocrystals Coherent coupling between surface plasmons and excitons in semiconductor nanocrystals

2009-03-18

arxiv.org/abs/0903.3248v1

Physics

Condensed Matter

Materials Science

12 pages, 4 figures

Scientific paper

10.1021/nl903455z

We present an experimental demonstration of strong coupling between a surface plasmon propagating on a planar silver substrate, and the lowest excited state of CdSe nanocrystals. Variable-angle spectroscopic ellipsometry measurements demonstrated the formation of plasmon-exciton mixed states, characterized by a Rabi splitting of $\sim$ 82 meV at room temperature. Such a coherent interaction has the potential for the development of plasmonic non-linear devices, and furthermore, this system is akin to those studied in cavity quantum electrodynamics, thus offering the possibility to study the regime of strong light-matter coupling in semiconductor nanocrystals at easily accessible experimental conditions.

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