Design, fabrication and characterization of indefinite metamaterials of nanowires

by Jie Yao, Yuan Wang, Kun-Tong Tsai, Zhaowei Liu, Xiaobo Yin, Guy Bartal, Angelica M. Stacy, Yuh-Lin Wang, and Xiang Zhang

Philosophical Transactions AVolume 369(1950):3434-3446

September 13, 2011

©2011 by The Royal Society

(a) Hyperbolic iso-frequency contour for an anisotropic indefinite medium when εv>0 and εp<0, and circular iso-frequency contour for an isotropic medium such as air.

Jie Yao et al. Phil. Trans. R. Soc. A 2011;369:3434-3446

©2011 by The Royal Society

(a) Schematic of the vertical cross section of the porous alumina membrane formed on top of an aluminium substrate.

Jie Yao et al. Phil. Trans. R. Soc. A 2011;369:3434-3446

©2011 by The Royal Society

Cross-sectional view of an AAO template after the growth of a silver nanowire using the electrochemical plating method.

Jie Yao et al. Phil. Trans. R. Soc. A 2011;369:3434-3446

©2011 by The Royal Society

Atomic force microscope images of the template bottom surface morphology after removal of the barrier layers.

Jie Yao et al. Phil. Trans. R. Soc. A 2011;369:3434-3446

©2011 by The Royal Society

A three-dimensional simulation of light transmission through the anisotropic sample.

Jie Yao et al. Phil. Trans. R. Soc. A 2011;369:3434-3446

©2011 by The Royal Society

SEM images of two nanowire samples with different uniformity.

Jie Yao et al. Phil. Trans. R. Soc. A 2011;369:3434-3446

©2011 by The Royal Society

SEM images of FIB pre-patterned samples.

Jie Yao et al. Phil. Trans. R. Soc. A 2011;369:3434-3446

©2011 by The Royal Society

Schematic setup for negative refraction in silver nanowire metamaterials (BS, beam splitter; L, tube lens; M, mirror; O, objective; P, polarizer; xyz-PZT, piezo-scanner tunable in xyz directions;

AFM, atomic force microscope; PMT, photomultiplier tube).

Jie Yao et al. Phil. Trans. R. Soc. A 2011;369:3434-3446

©2011 by The Royal Society

(a) Schematic picture of the light being negatively refracted at the air/metamaterial interface.

Jie Yao et al. Phil. Trans. R. Soc. A 2011;369:3434-3446

©2011 by The Royal Society