三角晶格磁振子晶体带结构的优化研究

Band-structure optimization of triangular lattice magnonic crystals

用平面波展开法数值计算了椭圆柱散射体正三角排列的二维磁振子晶体带结构.结果显示,同样的填充率下,带隙的宽度和中心频率随着椭圆两半径之比s的变化出现明显的变化,椭圆柱散射体在三角晶格中可以打开低频带隙或使低频带隙加宽.

In this paper, band structure of two-dimensional magnotic crystal composed of elliptic rods triangularly arranged is calculated by using the plane-wave expansion method. The results show that under the condition of the same filling ratio, the width and central frequency of band gap obviously change with the ratio between two radii of ellipse, and that elliptic cylinder scattering body can open the lower frequency band gap or widen the low frequency band gap.