Design, Fabrication and Characterization of Indefinite Metamaterials of Nanowires
Abstract
Indefinite optical properties, which are typically characterized by hyperbolic dispersion relations, have not been observed in naturally occurring materials, but can be realized through a metamaterial approach. We present here the design, fabrication and characterization of nanowire metamaterials with indefinite permittivity, in which all-angle negative refraction of light is observed. The bottom-up fabrication technique, which applies electrochemical plating of nanowires in porous alumina template, is developed and demonstrated in achieving uniform hyperbolic optical properties at a large scale. We developed techniques to improve the uniformity and to reduce the defect density in the sample. The non-magnetic design and the off-resonance operation of the nanowire metamaterials significantly reduce the energy loss of electromagnetic waves and make the broad-band negative refraction of light possible.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2011
- Accession Number
- ADA555888
Entities
People
- Angelica M. Stacy
- Guy Bartal
- Jie Yao
- Kun-tong Tsai
- Xiang Zhang
- Xiaobo Yin
- Yuan Wang
- Yuh-lin Wang
- Zhaowei Liu
Organizations
- University of California, Berkeley