Photonics Research, 2016, 4 (6): 06000257, Published Online: Dec. 23, 2016
Hybrid silicon slotted photonic crystal waveguides: how does third order nonlinear performance scale with slow light 
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Photonic crystals Photonic crystals Photonic crystal waveguides Photonic crystal waveguides Nonlinear optical devices Nonlinear optical devices Nonlinear optics Nonlinear optics integrated optics integrated optics
Abstract
We investigate in this paper the influence of slow light on the balance between the Kerr and two-photon absorption (TPA) processes in silicon slotted hybrid nonlinear waveguides. Three typical silicon photonic waveguide geometries are studied to estimate the influence of the light slow-down factor on the mode field overlap with the silicon region, as well as on the complex effective nonlinear susceptibility. It is found that slotted photonic crystal modes tend to focalize in their hollow core with increasing group index (nG) values. Considering a hybrid integration of nonlinear polymers in such slotted waveguides, a relative decrease of the TPA process by more factor of 2 is predicted from nG 10 to nG 50. As a whole, this work shows that the relative influence of TPA decreases for slotted waveguides operating in the slow light regime, making them a suitable platform for third-order nonlinear optics.
Junfei Xia, Samuel Serna, Weiwei Zhang, Laurent Vivien, éric Cassan. Hybrid silicon slotted photonic crystal waveguides: how does third order nonlinear performance scale with slow light[J]. Photonics Research, 2016, 4(6): 06000257.
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