A Carpet Cloak for Visible Light

被引：170

作者：

Gharghi, Majid ^{[1
]}

Gladden, Christopher ^{[1
]}

Zentgraf, Thomas ^{[2
]}

Liu, Yongmin ^{[1
]}

Yin, Xiaobo ^{[1
]}

Valentine, Jason ^{[3
]}

Zhang, Xiang ^{[1
,4
]}

机构：

[1] Univ Calif Berkeley, NSF Nanoscale Sci & Engn Ctr NSEC, Berkeley, CA 94720 USA

[2] Univ Paderborn, Dept Phys, D-33098 Paderborn, Germany

[3] Vanderbilt Univ, Dept Mech Engn, VU Stn B 351592, Nashville, TN 37235 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Mat Sci Div, Berkeley, CA 94720 USA

来源：

NANO LETTERS | 2011年 / 11卷 / 07期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Optical metamaterials; invisibility cloak; transformation optics; nanofabrication;

D O I：

10.1021/nl201189z

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

We report an invisibility carpet cloak device, which is capable of making an object undetectable by visible light. The cloak is designed using quasi conformal mapping and is fabricated in a silicon nitride waveguide on a specially developed nanoporous silicon oxide substrate with a very low refractive index (n<1.25). The spatial index variation is realized by etching holes of various sizes in the nitride layer at deep subwavelength scale creating a local effective medium index. The fabricated device demonstrates wideband invisibility throughout the visible spectrum with low loss. This silicon nitride on low index substrate can also be a general scheme for implementation of transformation optical devices at visible frequencies.

引用

页码：2825 / 2828

页数：4

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