Article

Optical and Quantum Electronics

, Volume 35, Issue 11, pp 1025-1036

First online:

High resonant reflection of a confined free space beam by a high contrast segmented waveguide

  • E. BonnetAffiliated withLaboratoire TSI UMR CNRS 5516, Université Jean Monnet
  • , X. LetartreAffiliated withLEOM, Ecole Centrale de Lyon, F-
  • , A. CachardAffiliated withLaboratoire TSI UMR CNRS 5516, Université Jean Monnet
  • , A.V. TishchenkoAffiliated withLaboratoire TSI UMR CNRS 5516, Université Jean Monnet
  • , O. ParriauxAffiliated withLEOM, Ecole Centrale de Lyon, F-

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Abstract

High resonant reflection of a free space wave from a deeply corrugated slab waveguide is shown to take place in the case of a focused free space beam under normal incidence. It is described as a result of a strong intra-guide coupling coefficient allowing the coupled wave to be closely localized under the incident beam, therefore to interfere with it with high contrast effects. The coupled mode inspired analysis gives the possibility of optimizing the resonant structure; it is related and compared with the photonic crystal vision of the same functional structure to which it confers more intelligibility.

coupled modes coupling gratings diffraction gratings photonic crystals resonant reflection