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arXiv · 0810.1001

Light localization induced enhancement of third order nonlinearities in a GaAs photonic crystal waveguide

A. Baron·A. Ryasnyanskiy·N. Dubreuil·P. Delaye·Q. Vy Tran·S. Combrie·A. de Rossi·R. Frey·G. Roosen
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Abstract

Nonlinear propagation experiments in GaAs photonic crystal waveguides (PCW) were performed, which exhibit a large enhancement of third order nonlinearities, due to light propagation in a slow mode regime, such as two-photon absorption (TPA), optical Kerr effect and refractive index changes due to TPA generated free-carriers. A theoretical model has been established that shows very good quantitative agreement with experimental data and demonstrates the important role that group velocity plays. These observations give a strong insight into the use of PCWs for optical switching devices.

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A. Baron, A. Ryasnyanskiy, N. Dubreuil, P. Delaye, Q. Vy Tran, S. Combrie, A. de Rossi, R. Frey, G. Roosen. 2008-10-06. Light localization induced enhancement of third order nonlinearities in a GaAs photonic crystal waveguide. https://doi.org/10.1364/oe.17.000552

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