Light localization induced enhancement of third order nonlinearities in a GaAs photonic crystal waveguide.
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 free-carriers generated by TPA. A theoretical model has been established that shows a very good quantitative agreement with experimental data and demonstrates the important role that the group velocity plays. These observations give a strong insight into the use of PCWs for optical switching devices.
Baron
Alexandre
A
Laboratoire Charles Fabry de l'Institut d'Optique, CNRS, Univ Paris-Sud, Campus Polytechnique, RD128, 91127, Palaiseau Cedex, France. alexandre.baron@institutoptique.fr
Ryasnyanskiy
Aleksandr
A
Dubreuil
Nicolas
N
Delaye
Philippe
P
Vy Tran
Quynh
Q
Combrié
Sylvain
S
de Rossi
Alfredo
A
Frey
Robert
R
Roosen
Gerald
G