Efficient parametric generation of counterpropagating two-photon states

Abstract

Guided-wave parametric downconversion with a transverse pump is a versatile means to generate a wide range of two-photon states. We propose and compare some microcavity-based schemes for the generation of counterpropagating photon pairs, and we experimentally demonstrate a bright source emitting $1.2\times {10}^{-11}\text{\hspace{0.17em} pairs}/\text{pump}$ photon for a $1.8\mathrm{mm}$ long waveguide. These results are promising for integrated quantum information technology.

© 2010 Optical Society of America

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