Design, fabrication and characterization of indefinite metamaterials of nanowires.

نویسندگان

  • Jie Yao
  • Yuan Wang
  • Kun-Tong Tsai
  • Zhaowei Liu
  • Xiaobo Yin
  • Guy Bartal
  • Angelica M Stacy
  • Yuh-Lin Wang
  • Xiang Zhang
چکیده

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.

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عنوان ژورنال:
  • Philosophical transactions. Series A, Mathematical, physical, and engineering sciences

دوره 369 1950  شماره 

صفحات  -

تاریخ انتشار 2011