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Diffraction efficiency and guided light control by two-dimensional photonic-bandgap lattices

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9 Author(s)
Labilloy, D. ; Lab. de Phys. de la Matiere Condensee, Ecole Polytech., Palaiseau, France ; Benisty, H. ; Weisbuch, C. ; Krauss, T.F.
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We report on the measurement of the diffraction efficiency of two-dimensional photonic-bandgap lattices consisting of a triangular array of circular air holes etched in a semiconductor waveguide. We use the spontaneous emission of the material as an internal point source. Combined with previous reflectivity and transmission measurements, the diffraction data allow us to assess the total amount of out-of-plane losses experienced by a guided wave traversing the dielectric lattice, as a function of the lattice pitch. We found that these losses are particularly weak for some range of parameters, especially in the photonic bandgap of interest. We discuss the reasons why they can be substantial with other parameters

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Quantum Electronics, IEEE Journal of  (Volume:35 ,  Issue: 7 )