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Structures guidantes à bande interdite photonique à base de silicium nanoporeux

Abstract : The aim of this work is the elaboration and the study of photonic bandgap microstructures using nanoporous silicon. We consider first planar microstructures like microcavities, and we study their influence on the angular and spatial distribution of the photoluminescence of the material. It appears that it is necessary to control the propagation of light in the plane of the structure. For this reason, we try to favour the lateral propagation, thanks to a vertical structuration of the optical index, and we study the guiding in two kinds of structures, using either a conventional guiding by total internal reflection, or a guiding by Bragg reflection. We also suggest a numerical method based on the standard transfer-matrix method, that allows the calculation of the attenuation of the power guided in the plane. Then, we use a holographic process demonstrated by previous works, in order to obtain a lateral structuration of the optical index, and we study its effects on the guided light. The transmittance, measured on a multimode waveguide using white light, shows several stopbands, which are attributed to diagonal and off-diagonal couplings. The comparison of these measurements and the coupled-mode theory allows us to give a map of the optical index of the structure. It appears a strong birefringence in regions that were illuminated during the holographic process, giving rise to a stronger decrease of the extraordinary index (delta n = -0.4) than the ordinary index (delta n = -0.22). With a period of 450 nm, these values of index contrast are promising, even if the effective depth on which the index is modulated is only 0.5 micrometers.
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Contributor : Patrick Ferrand <>
Submitted on : Thursday, October 28, 2004 - 7:03:22 PM
Last modification on : Wednesday, May 13, 2020 - 11:04:14 AM
Long-term archiving on: : Monday, September 20, 2010 - 12:09:17 PM


  • HAL Id : tel-00003341, version 2




Patrick Ferrand. Structures guidantes à bande interdite photonique à base de silicium nanoporeux. domain_stic.inge. Université Joseph-Fourier - Grenoble I, 2001. Français. ⟨tel-00003341v2⟩



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