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Physical Review Letters

Semiconductor Waveguide Source of Counterpropagating Twin Photons

L. Lanco, S. Ducci, J.-P. Likforman, X. Marcadet, J. A. W. van Houwelingen, Hugo Zbinden, Giuseppe Leo, V. Berger

Published Oct 23, 2006• 91 citations
Publisher

Abstract

We experimentally demonstrate an integrated semiconductor source of counterpropagating twin photons in the telecom range. A pump beam impinging on top of an AlGaAs waveguide generates parametrically two counterpropagating, orthogonally polarized signal/idler guided modes. A 2 mm long waveguide emits at room temperature one average photon pair per pump pulse, with a spectral linewidth of 0.15 nm. The twin character of the emitted photons is ascertained through a time-correlation measurement. This work opens a route towards new guided-wave semiconductor quantum devices.

DOI
10.1103/physrevlett.97.173901

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