Engineering the near-field imaging of a rectangular-lattice photonic-crystal slab in the second band

被引：0
|
作者：
Shuai Feng
Ling Ao
YiQuan Wang
机构：
[1] Central University for Nationalities,College of science
来源：
Science in China Series G: Physics, Mechanics and Astronomy | 2009年 / 52卷
关键词：
photonic crystal; negative refraction; subwavelength imaging;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Imaging properties of a two-dimensional rectangular-lattice photonic crystal (PC) slab consisting of air holes immersed in a dielectric are studied in this work. The field patterns of electromagnetic waves radiated from a point source through the PC slab are calculated with the finite-difference time-domain method. Comparing the field patterns with the corresponding equifrequency-surface contours simulated by the plane-wave expansion method, we find that an excellent-quality near-field image may be formed through the PC slab by the mechanisms of the simultaneous action of the self-collimation effect and the negative-refraction effect. Near-field imaging may be obtained within two different frequency regions in two vertical directions of the PC slab.
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页码：87 / 91
页数：4
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