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首页> 外文期刊>Optical Review >A Non-Energy-Concentrating Lens Using Left-Handed Material
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A Non-Energy-Concentrating Lens Using Left-Handed Material

机译：使用左手材料的非聚光透镜

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In a planar lens made of left-handed material (LHM), the rays converge to a focal point in the material and once again in free space. The problems exhibited by the planar lens are its great thickness, the long optical path length, and energy concentration in the LHM. We examine a bowl-shaped LHM lens with an index n = ?1. In this lens, the back is a concave hemispherical surface and the rays never converge in the LHM, but in free space only. We also designed a quantized bowl-shaped LHM lens composed of multiple layers of thin LHM plates of uniform thickness. A bowl-shaped LHM lens quantized with more than 4 bits has a lens function similar to that of a smooth curved lens. The bowl-shaped lens is characterized by its thinness, its short optical path length, and the absence of energy concentration in the LHM. Furthermore, the quantized bowl-shaped LHM lens can be fabricated. Wave propagation through these lenses is numerically simulated using the finite difference time domain (FDTD) method.
机译：在由左手材料（LHM）制成的平面透镜中，光线会聚到材料中的焦点，然后会聚到自由空间中。平面透镜表现出的问题是其较大的厚度，较长的光程长度以及LHM中的能量集中。我们研究了折射率为n =？1的碗形LHM透镜。在该透镜中，背面是凹形的半球形表面，光线从不会在LHM中会聚，而只会在自由空间中会聚。我们还设计了一个定量碗状LHM透镜，该透镜由多层厚度均匀的LHM薄板组成。用超过4位量化的碗形LHM透镜具有类似于平滑曲面透镜的透镜功能。碗形透镜的特点是薄，光程短，LHM中没有能量集中。此外，可以制造量化的碗形LHM透镜。使用有限时域（FDTD）方法对通过这些透镜的波传播进行数值模拟。

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