8 May 2007 AlGaAs waveguide generation of counterpropagating twin photons
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We 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 nature of the emitted photons is tested through a time-correlation measurement.
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L. Lanco, L. Lanco, S. Ducci, S. Ducci, J. Likforman, J. Likforman, M. Ravaro, M. Ravaro, V. Berger, V. Berger, G. Leo, G. Leo, } "AlGaAs waveguide generation of counterpropagating twin photons", Proc. SPIE 6582, Nonlinear Optics and Applications II, 65820M (8 May 2007); doi: 10.1117/12.723128; https://doi.org/10.1117/12.723128

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