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arXiv:1003.5698 · Physical Review B

Few-photon optical diode

Dibyendu Roy

Published Apr 21, 2010• 139 citations
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Abstract

We propose a scheme of realizing an optical diode at the few-photon level. The system consists of a one-dimensional waveguide coupled asymmetrically to a two-level system. The two or multiphoton transport in this system is strongly correlated. We derive exactly the single and two-photon current and show that the two-photon current is asymmetric for the asymmetric coupling. Thus the system serves as an optical diode which allows transmission of photons in one direction much more efficiently than the opposite.

DOI
10.1103/physrevb.81.155117

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