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Quasi-phase matched second-harmonic generation in an AlxGa1-xAs asymmetric quantum-well waveguide using ion-implantation-enhanced intermixing

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8 Author(s)
Bouchard, J.-P. ; Centre d’Optique, Photonique et Laser, Université Laval, Ste. Foy, Quebec G1K 7P4, Canada ; Tetu, M. ; Janz, S. ; Xu, D.
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Quasi-phase matched second-harmonic generation in the copropagating geometry is demonstrated in an asymmetric quantum-well waveguide. Modulation of the nonlinear susceptibility along the waveguide was achieved using a patterned quantum-well intermixing process. Photoluminescence measurements of the quantum-well bandedges indicate that a grating of alternating regions of intermixed and as-grown asymmetric quantum wells was produced for periods between 2 and 12 μm. The variation of the second-harmonic light intensity generated by guided incident light between λ=1480 and 1600 nm was measured. The resulting second-harmonic spectra show sharp quasi-phase matching resonances for grating periods near 3 μm, demonstrating that a periodic modulation of the quantum-well nonlinear susceptibility was produced. © 2000 American Institute of Physics.

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Applied Physics Letters  (Volume:77 ,  Issue: 26 )