Finite-size effects of a left-handed material slab on the image quality.
Finite-size effects of a left-handed material slab on the image quality.
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DOI：
10.1103/physrevlett.92.107404
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发表时间：
2003-06
影响因子：
8.6
通讯作者：
Long Chen;Sailing He;Linfang Shen
中科院分区：
文献类型：
--
作者：
Long Chen;Sailing He;Linfang Shen
研究了有限长度左手材料(LHM)板片形成的成像系统的特性，分析了板片有限长度对图像质量的影响。像侧的表面亮点和负能量流等异常现象被观察到并解释为由入射场的倏逝分量激发的表面等离子体激元的空腔效应。对于薄的 LHM 板，发现空腔效应对板的长度相当敏感；平板底面上的亮点可能会延伸到图像平面并降低图像质量。
The characteristics of an imaging system formed by a left-handed material (LHM) slab of finite length are studied, and the influence of the finite length of the slab on the image quality is analyzed. Unusual phenomena such as surface bright spots and negative energy stream at the image side are observed and explained as the cavity effects of surface plasmons excited by the evanescent components of the incident field. For a thin LHM slab, the cavity effects are found rather sensitive to the length of the slab; the bright spots on the bottom surface of the slab may stretch to the image plane and degrade the image quality.