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

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...

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Published in:Optics express 2013-07, Vol.21 (13), p.15144-15154
Main Authors: Hamel, P, Grinberg, P, Sauvan, C, Lalanne, P, Baron, A, Yacomotti, A M, Sagnes, I, Raineri, F, Bencheikh, K, Levenson, J A
Format: Article
Language:English
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Engineering Sciences
Optics
Photonic
Physics
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cited_by cdi_FETCH-LOGICAL-c363t-29ce518300816eb99caa42c01879e85fea024dcac255bd9463da271540e78c633
cites cdi_FETCH-LOGICAL-c363t-29ce518300816eb99caa42c01879e85fea024dcac255bd9463da271540e78c633
container_end_page 15154
container_issue 13
container_start_page 15144
container_title Optics express
container_volume 21
creator Hamel, P
Grinberg, P
Sauvan, C
Lalanne, P
Baron, A
Yacomotti, A M
Sagnes, I
Raineri, F
Bencheikh, K
Levenson, J A
description 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.
doi_str_mv 10.1364/OE.21.015144
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subjects Engineering Sciences
Optics
Photonic
Physics
title Coupling light into a slow-light photonic-crystal waveguide from a free-space normally-incident beam
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