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

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.

Subject Categories:

  • Metallurgy and Metallography
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE