Engineering the point spread function of layered metamaterials

Layered metal-dielectric metamaterials have filtering properties both in the frequency domain and in the spatial frequency domain. Engineering their spatial filtering response is a way of designing structures with specific diffraction properties for such applications as sub-diffraction imaging, supe...

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Bibliographic Details
Published in:arXiv.org 2014-08
Main Authors: Pastuszczak, Anna, Stolarek, Marcin, Kotynski, Rafal
Format: Article
Language:English
Subjects:
Dielectric properties
Diffraction
Evolutionary algorithms
Frequency domain analysis
Metamaterials
Optical communication
Optical properties
Optimization
Point spread functions
Signal processing
Spatial filtering
Surface roughness
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Summary:Layered metal-dielectric metamaterials have filtering properties both in the frequency domain and in the spatial frequency domain. Engineering their spatial filtering response is a way of designing structures with specific diffraction properties for such applications as sub-diffraction imaging, supercollimation, or optical signal processing at the nanoscale. In this paper we review the recent progress in this field. We also present a numerical optimization framework for layered metamaterials, based on the use of evolutionary algorithms. A measure of similarity obtained using Hoelder's inequality is adapted to construct the overall criterion function. We analyze the influence of surface roughness on the quality of imaging.
ISSN:2331-8422
DOI:10.48550/arxiv.1408.6344