Single-photon all-optical switching using waveguide-cavity quantum electrodynamics

Peter Bermel, Alejandro Rodriguez, Steven G. Johnson, John D. Joannopoulos, and Marin Soljačić
Phys. Rev. A 74, 043818 – Published 24 October 2006

Abstract

This paper demonstrates switching of a single signal photon by a single gating photon of a different frequency, via a cross-phase-modulation. This effect is mediated by materials exhibiting electromagnetically induced transparency (EIT), which are embedded in photonic crystals (PhCs). An analytical model based on waveguide-cavity QED is constructed for our system, which consists of a PhC waveguide and a PhC microcavity containing a four-level EIT atom. It is solved exactly and analyzed using experimentally accessible parameters. It is found that the strong coupling regime is required for lossless two-photon quantum entanglement.

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  • Received 7 May 2006

DOI:https://doi.org/10.1103/PhysRevA.74.043818

©2006 American Physical Society

Authors & Affiliations

Peter Bermel, Alejandro Rodriguez, Steven G. Johnson, John D. Joannopoulos, and Marin Soljačić

  • Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

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Issue

Vol. 74, Iss. 4 — October 2006

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