Qi Xinyuan, Zhang Guoquan, Xu Ningning, Qi Yiling, Han Bin, Fu Yulan, Duan Changsha, Xu Jingjun
The MOE Key Laboratory of Weak Light Nonlinear Photonics, Nankai University, Tianjin 300457, China.
Opt Express. 2009 Dec 7;17(25):23078-84. doi: 10.1364/OE.17.023078.
A weakly modulated large-area two-dimensional square photonic lattice slab was fabricated through optical induction technique in a photorefractive photovoltaic LiNbO(3):Fe crystal. Bragg-matched diffraction technique was used to characterize the square photonic lattice slab. Interestingly, linear discrete diffraction typical for waveguide arrays was observed in such a square photonic lattice slab, indicating that the lattice slab can be viewed effectively as a one-dimensional waveguide array. Furthermore, discrete soliton was demonstrated in the photonic lattice slab due to a saturable self-defocusing nonlinearity arising from the bulk photorefractive photovoltaic effect of LiNbO(3):Fe.
通过光感应技术在光折变光伏LiNbO₃:Fe晶体中制备了一种弱调制大面积二维方形光子晶格平板。采用布拉格匹配衍射技术对该方形光子晶格平板进行表征。有趣的是，在这种方形光子晶格平板中观察到了波导阵列典型的线性离散衍射，这表明该晶格平板可有效地视为一维波导阵列。此外，由于LiNbO₃:Fe的体光折变光伏效应产生的可饱和自散焦非线性，在光子晶格平板中演示了离散孤子。
