Left-handed metamaterial coatings for subwavelength-resolution imaging

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Title: Left-handed metamaterial coatings for subwavelength-resolution imaging
Authors: Zapata Rodríguez, Carlos Javier | Pastor Calle, David | Martínez Martínez, Luis Enrique | Miret, Juan Jose
Research Group/s: Óptica y Ciencias de la Visión
Center, Department or Service: Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía
Keywords: Image formation theory | Metamaterials | Aberration compensation
Knowledge Area: Óptica
Issue Date: 30-Aug-2012
Publisher: Optical Society of America
Citation: Journal of the Optical Society of America A. 2012, 29(9): 1992-1998. doi:10.1364/JOSAA.29.001992
Abstract: We report on a procedure to improve the resolution of far-field imaging by using a neighboring high-index medium that is coated with a left-handed metamaterial. The resulting plot can also exhibit an enhanced transmission by considering proper conditions to retract backscattering. Based on negative refraction, geometrical aberrations are considered in detail since they may cause a great impact in this sort of diffraction-unlimited imaging by reducing its resolution power. We employ a standard aberration analysis to refine the asymmetric configuration of metamaterial superlenses. We demonstrate that low-order centrosymmetric aberrations can be fully corrected for a given object plane. For subwavelength-resolution imaging, however, high-order aberrations become of relevance, which may be balanced with defocus. Not only the point spread function but also numerical simulations based on the finite-element method support our theoretical analysis, and subwavelength resolution is verified in the image plane.
Sponsor: This research was funded by the Spanish Ministry of Economy and Competitiveness under the project TEC2009-11635.
URI: http://hdl.handle.net/10045/33876
ISSN: 1084-7529 (Print) | 1520-8532 (Online)
DOI: 10.1364/JOSAA.29.001992
Language: eng
Type: info:eu-repo/semantics/article
Rights: This paper was published in Journal of the Optical Society of America A, and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/josaa/abstract.cfm?uri=josaa-29-9-1992. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Peer Review: si
Publisher version: http://dx.doi.org/10.1364/JOSAA.29.001992
Appears in Collections:INV - IMAOS+V - Artículos de Revistas

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