Ultrathin high-index metasurfaces for shaping focused beams

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Title: Ultrathin high-index metasurfaces for shaping focused beams
Authors: Naserpour, Mahin | Zapata Rodríguez, Carlos Javier | Díaz-Aviñó, Carlos | Hashemi, Mahdieh | 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: Subwavelength structures | Surface plasmons | Resolution
Knowledge Area: Óptica
Issue Date: 1-Sep-2015
Publisher: Optical Society of America
Citation: Mahin Naserpour, Carlos J. Zapata-Rodríguez, Carlos Díaz-Aviñó, Mahdieh Hashemi, and Juan J. Miret, "Ultrathin high-index metasurfaces for shaping focused beams," Appl. Opt. 54, 7586-7591 (2015). doi:10.1364/AO.54.007586
Abstract: The volume size of a converging wave, which plays a relevant role in image resolution, is governed by the wavelength of the radiation and the numerical aperture (NA) of the wavefront. We designed an ultrathin (λ/8 width) curved metasurface that is able to transform a focused field into a high-NA optical architecture, thus boosting the transverse and (mainly) on-axis resolution. The elements of the metasurface are metal-insulator subwavelength gratings exhibiting extreme anisotropy with ultrahigh index of refraction for TM polarization. Our results can be applied to nanolithography and optical microscopy.
Sponsor: Spanish Ministry of Economy and Competitiveness (MEC) (TEC2013-50416-EXP).
URI: http://hdl.handle.net/10045/52496
ISSN: 1559-128X (Print) | 2155-3165 (Online)
DOI: 10.1364/AO.54.007586
Language: eng
Type: info:eu-repo/semantics/article
Rights: This paper was published in Applied Optics, 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: https://www.osapublishing.org/ao/abstract.cfm?uri=ao-54-25-7586. 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/AO.54.007586
Appears in Collections:INV - IMAOS+V - Artículos de Revistas

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