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arXiv · 1502.03886

Enhanced Kerr electro-optic nonlinearity through cascaded Pockels effects

Guang-Zhen Li·Yu-Ping Chen·Hao-Wei Jiang·Xian-Feng Chen
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Abstract

We demonstrated a large enhancement of Kerr electro-optic nonlinearity through cascaded Pockels effects in a domain inversion ferroelectric crystal. We designed a structure that can implement the cascaded Pockels effects and second-harmonic generation simultaneously. The energy coupling between the fundamental lights of different polarizations led to a large nonlinear phase shift, and thus an effective electro-optic nonlinear refractive index. The effective nonlinearity can be either positive or negative, causing the second-harmonic spectra to move towards the coupling center, which in turn, offered us a way to measure the effective electro-optic nonlinear refractive index. The corresponding enhanced Kerr electro-optic nonlinearity is more than three orders of magnitude higher than the intrinsic value. These results open a door to manipulate the nonlinear phase by applying external electric field instead of light intensity in noncentrosymmetric crystals.

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Guang-Zhen Li, Yu-Ping Chen, Hao-Wei Jiang, Xian-Feng Chen. 2015-02-13. Enhanced Kerr electro-optic nonlinearity through cascaded Pockels effects. https://doi.org/10.1364/prj.3.000168

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