Cao Zheng, Qi Xinyuan, Feng Xuanqi, Ren Zhaoyu, Zhang Guoquan, Bai Jintao
Department of Physics, Northwest University, Xi’an 710069, China.
Opt Express. 2012 Aug 13;20(17):19119-24. doi: 10.1364/OE.20.019119.
We numerically study the propagation of Gaussian beams in four different types of transverse separation modulated photonic lattices. We find the modulation obeying hyperbolic secant or rectangular functions can act as optical potentials, and the light waves can be localized or recur in the regions between such two positive potentials, respectively. While the beams decay in the regions between such two negative potentials since these structures could not support localized modes. Our results provide new ways for light controlling and manipulation in photonic lattices.
我们对高斯光束在四种不同类型的横向间距调制光子晶格中的传播进行了数值研究。我们发现，服从双曲正割或矩形函数的调制可以充当光学势，光波可以分别在这两个正势之间的区域局域化或重现。而光束在这两个负势之间的区域衰减，因为这些结构无法支持局域模式。我们的结果为光子晶格中的光控制和操纵提供了新方法。
