Anisotropic photonic lattices and discrete solitons in photorefractive media
نویسندگان
چکیده
We study experimentally two-dimensional periodic photonic lattices optically imprinted in photorefractive nonlinear media, and explore the effect of anisotropy on the induced refractive-index patterns. The orientation anisotropy is demonstrated by comparing square and diamond lattices, while the polarization anisotropy is shown to distinguish ordinarily and extraordinarily polarized light. In particular, the extraordinarily polarized lattice induces much stronger refractiveindex modulation for the same conditions. Finally, we exploit the photorefractive anisotropy to generate a quasi-onedimensional refractive-index pattern for the observation of twodimensional solitons and corroborate these experiments by numerical simulations. PACS 42.65.Tg; 42.65.Wi
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