Experimental demonstration of non-near-field image formed by negative refraction

被引：27

作者：

Feng, ZF

Zhang, XD

Ren, K

Feng, SH

Li, ZY

Cheng, BY

Zhang, DZ

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China

[2] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.73.075118

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have experimentally investigated the negative refraction and focusing by a two-dimensional photonic crystal (PC) made from a triangular lattice of metal-core dielectric-shell coated cylinders. At a certain frequency, the PC structure has an isotropic band at which the phase velocity is antiparallel to the group velocity. As a result, the PC structure can exhibit negative refraction and the corresponding effective refractive index can be close to the ideal value of -1. A flat lens formed from such a PC has been designed and its imaging properties have been investigated systematically. The measurement results show that the flat lens can form non-near-field images, and the source and image distance follow the conventional wave-beam negative refraction law for the refractive index of -1 irrespective of the slab thickness and the source distance.

引用

页数：5

共 24 条

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PHYSICAL REVIEW B, 2004, 70 (19) :1-9

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