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Proceedings Paper

Negative refractive index in ferromagnetic semiconductors: experimental verification
Author(s): Adil-Gerai Kussow; Yassine Ait El Aoud; Hamzeh M. Jaradat; Alkim Akyurtlu
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Paper Abstract

In this work, we show that natural crystals, or magnetic semiconductor, Cr-doped indium oxide, has a negative refractive index at ~ 27.8 micron wavelength. The effect was predicted by two of us a few years ago (A.G. Kussow and A. Akyurtlu, Phys. Rev. B, 78, 205202 (2008)). Our result seriously undermines wide-spread opinion that only composite artificial metamaterials can demonstrate negative refractive index. Thin ferromagnetic films of ICO were fabricated by original post-annealing sputtering method. FTIR R and T measurements were processed to extract refractive index within the range of interest. The extracted from combined transmittance and reflectance FTIR data negative refractive index band parameters are found to be close to expected one.

Paper Details

Date Published: 15 October 2012
PDF: 6 pages
Proc. SPIE 8455, Metamaterials: Fundamentals and Applications V, 84551F (15 October 2012); doi: 10.1117/12.928198
Show Author Affiliations
Adil-Gerai Kussow, Univ. of Massachusetts Lowell (United States)
Yassine Ait El Aoud, Univ. of Massachusetts Lowell (United States)
Hamzeh M. Jaradat, Univ. of Massachusetts Lowell (United States)
Alkim Akyurtlu, Univ. of Massachusetts Lowell (United States)

Published in SPIE Proceedings Vol. 8455:
Metamaterials: Fundamentals and Applications V
Allan D. Boardman; Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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