
Proceedings Paper
Functional optical metamaterials employing spatial dispersion and absorptionFormat | Member Price | Non-Member Price |
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Paper Abstract
Functional optical metamaterials usually consist of absorbing, anisotropic and often non-centrosymmetric structures
of a size that is only a few times smaller than the wavelength of visible light. If the structures would be
substantially smaller, excitation of higher-order electromagnetic multipoles in them, including magnetic dipoles,
would be inefficient. As a result, the material would act as an ordinary electric-dipole material. The required
non-negligible size of metamolecules, however, makes the material spatially dispersive, so that its optical characteristics
depend on light propagation direction. This phenomenon significantly complicates the description of
metamaterials in terms of conventional electric permittivity and magnetic permeability tensors. In this work,
we present a simple semianalytical method to describe such spatially dispersive metamaterials, which are also
allowed to be optically anisotropic and non-centrosymmetric. Applying the method, we show that a strong spatial
dispersion, combined with absorption and optical anisotropy, can be used to efficiently control propagational
characteristics of optical beams.
Paper Details
Date Published: 12 September 2014
PDF: 8 pages
Proc. SPIE 9160, Metamaterials: Fundamentals and Applications 2014, 91600S (12 September 2014); doi: 10.1117/12.2060808
Published in SPIE Proceedings Vol. 9160:
Metamaterials: Fundamentals and Applications 2014
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)
PDF: 8 pages
Proc. SPIE 9160, Metamaterials: Fundamentals and Applications 2014, 91600S (12 September 2014); doi: 10.1117/12.2060808
Show Author Affiliations
A. Shevchenko, Aalto Univ. School of Science and Technology (Finland)
P. Grahn, Aalto Univ. School of Science and Technology (Finland)
P. Grahn, Aalto Univ. School of Science and Technology (Finland)
M. Kaivola, Aalto Univ. School of Science and Technology (Finland)
Published in SPIE Proceedings Vol. 9160:
Metamaterials: Fundamentals and Applications 2014
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)
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