HAMEL, Philippe; GRINBERG, Patricio; SAUVAN, Christophe; LALANNE, Philippe; BARON, Alexandre; YACOMOTTI, Alejandro; SAGNES, Isabelle; RAINERI, Fabrice; BENCHEIKH, Kamel; LEVENSON, Juan Ariel

doi:10.1364/OE.21.015144

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HAMEL, Philippe
Laboratoire de photonique et de nanostructures [LPN]

GRINBERG, Patricio
Laboratoire de photonique et de nanostructures [LPN]

SAUVAN, Christophe
lp2n-03,lp2n-13

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Optics Express. 2013-06-18, vol. 21, p. 15144-15154

Optical Society of America - OSA Publishing

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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.< Leer menos

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Coupling light into a slow-light photonic-crystal waveguide from a free-space normally-incident beam

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