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

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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Alexandre Baron, Aleksandr Ryasnyanskiy, Nicolas Dubreuil, Philippe Delaye, Quynh Vy Tran, et al.. Light localization induced enhancement of third order nonlinearities in a GaAs photonic crystal waveguide. Optics Express, Optical Society of America, 2009, 17 (2), pp.552-557. ⟨10.1364/OE.17.000552⟩. ⟨hal-00560953⟩

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