Energy-time entanglement preservation in plasmon-assisted light transmission

We report on experimental evidence of the preservation of the energy-time entanglement of a pair of photons after a photon-plasmon-photon conversion. This preservation is observed in two different plasmon conversion experiments, namely, extraordinary optical transmission through subwavelength metall...

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Bibliographic Details
Published in:Physical review letters 2005-03, Vol.94 (11), p.110501
Main Authors: Fasel, Sylvain, Robin, Franck, Moreno, Esteban, Erni, Daniel, Gisin, Nicolas, Zbinden, Hugo
Format: Article
Language:English
Online Access:Get full text
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Summary:We report on experimental evidence of the preservation of the energy-time entanglement of a pair of photons after a photon-plasmon-photon conversion. This preservation is observed in two different plasmon conversion experiments, namely, extraordinary optical transmission through subwavelength metallic hole arrays and long range surface plasmon propagation in metallic waveguides. Plasmons are shown to coherently exist at two different times separated by much more than their lifetimes. This kind of entanglement involving light and matter is expected to be useful for future processing and storing of quantum information.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.94.110501