Coupling light into a slow-light photonic-crystal waveguide from a free-space normally-incident beam
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en
Article de revue
Ce document a été publié dans
Optics Express. 2013-06-18, vol. 21, p. 15144-15154
Optical Society of America - OSA Publishing
Résumé en anglais
We present a coupler design allowing normally-incident light coupling from free-space into a monomode photonic crystal waveguide operating in the slow-light regime. Numerical three-dimensional calculations show that ...Lire la suite >
We present a coupler design allowing normally-incident light coupling from free-space into a monomode photonic crystal waveguide operating in the slow-light regime. Numerical three-dimensional calculations show that extraction efficiencies as high as 80% can be achieved for very large group indices up to 100. We demonstrate experimentally the device feasibility by coupling and extracting light from a photonic crystal waveguide over a large group-index range (from 10 to 60). The measurements are in good agreement with theoretical predictions. We also study numerically the impact of various geometrical parameters on the coupler performances.< Réduire
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