不同厚度有耗左手材料板中的电磁波研究
Electromagnetic wave propagating through different thickness lossy left-handed material slab
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摘要: 基于有损耗的Lorentz模型的时域有限差分（FDTD）方法，模拟了有耗左手材料（LHM）平板对波源的图像聚焦特性。分别计算了不同宽度的左手材料平板结构。通过比较说明电磁波在不同厚度左手材料板中传播方式相同。材料板越薄，其聚焦点的位置越往板边缘靠近。当左手材料板的厚度不满足聚焦尺寸时，该聚焦点将会消失。
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关键词:
- 时域有限差分（FDTD）方法 /
- 有耗左手材料（LHM）板 /
- 图像聚焦
Abstract: FDTD method of lossy left-handed material is used to simulate the focus of a parallel-sided slab illuminated by a monochromatic source on the far side. Different slab thickness structures are simulated separately. Comparison shows that the thinner LHM slab would make its image focus point closer to the slab side. However, a very narrow slab could make the image focus disappear.-
Key words:
- fdtd method /
- left-handed material slab /
- image focus
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