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Ansys Learning Forum Forums Discuss Simulation Photonics – Chinese 求问fdtd计算远场极化状态时的gratingn函数报错 Reply To: 求问fdtd计算远场极化状态时的gratingn函数报错

Guilin Sun
Ansys Employee

周期结构用偶极子完全没有必要做远场分析,因为这些偶极子是相干的,并且又是周期的,此时的远场没有实际物理意义!你琢磨琢磨,结果随着偶极子位置和个数变化,这样的远场有什么物理意义?

偶极子可以激发各种模式,只是某个特定偏振能更有效激发而已。

当然,你如果觉得有意义,你可以仿真,不过问题就没法答复了。