Accession Number:
ADA555888
Title:
Design, Fabrication and Characterization of Indefinite Metamaterials of Nanowires
Descriptive Note:
Journal article
Corporate Author:
CALIFORNIA UNIV BERKELEY NANOSCALE SCIENCE AND ENGINEERING CENTER
Personal Author(s):
Report Date:
2011-01-01
Pagination or Media Count:
15.0
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.
Descriptors:
Subject Categories:
- Metallurgy and Metallography
- Optics