Theory of optical imaging beyond the diffraction limit with a far-field superlens

被引：7

作者：

Durant, Stephane ^{[1
]}

Liu, Zhaowei ^{[1
]}

Fang, Nicholas ^{[2
]}

Zhang, Xiang ^{[1
]}

机构：

[1] Univ Calif Berkeley, NSF, NSEC, Etcheverry Hall, Berkeley, CA 94720 USA

[2] Univ Illinois, Dept Mech & Ind Engn, Urbana, IL 61801 USA

来源：

PLASMONICS: METALLIC NANOSTRUCTURES AND THEIR OPTICAL PROPERTIES IV | 2006年 / 6323卷

关键词：

D O I：

10.1117/12.680804

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Recent theoretical and experimental studies have shown that imaging with resolution well beyond the diffraction limit can be obtained with so-called superlenses. Images formed by such superlenses are, however, in the near field only, or a fraction of wavelength away from the lens. In this paper, we propose a far-field superlens (FSL) device which is composed of a planar superlens with periodical corrugation. We show in theory that when an object is placed in close proximity of such a FSL, a unique image can be formed in far-field. As an example, we demonstrate numerically that images of 40 nm lines with a 30 run gap can be obtained from far-field data with properly designed FSL working at 376nm wavelength.

引用

页数：8