Subwavelength Bessel beams in wire media
Contribuinte(s) |
Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía Óptica y Ciencias de la Visión |
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Data(s) |
04/11/2015
04/11/2015
01/01/2014
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Resumo |
Recent progress is emerging on nondiffracting subwavelength fields propagating in complex plasmonic nanostructures. In this paper, we present a thorough discussion on diffraction-free localized solutions of Maxwell’s equations in a periodic structure composed of nanowires. This self-focusing mechanism differs from others previously reported, which lie on regimes with ultraflat spatial dispersion. By means of the Maxwell–Garnett model, we provide a general analytical expression of the electromagnetic fields that can propagate along the direction of the cylinder’s axis, keeping its transverse waveform unaltered. Numerical simulations based on the finite element method support our analytical approach. In particular, moderate filling fractions of the metallic composite lead to nonresonant-plasmonic spots of light propagating with a size that remains far below the limit of diffraction. This research was funded by the Spanish Ministry of Economy and Competitiveness under the project TEC2011-29120-C05-01. |
Identificador |
Carlos J. Zapata-Rodríguez and Juan J. Miret, "Subwavelength Bessel beams in wire media," J. Opt. Soc. Am. B 31, 135-143 (2014). doi:10.1364/JOSAB.31.000135 0740-3224 (Print) 1520-8540 (Online) http://hdl.handle.net/10045/50925 10.1364/JOSAB.31.000135 |
Idioma(s) |
eng |
Publicador |
Optical Society of America |
Relação |
http://dx.doi.org/10.1364/JOSAB.31.000135 |
Direitos |
This paper was published in JOSA B 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/josab/abstract.cfm?uri=josab-31-1-135. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. info:eu-repo/semantics/openAccess |
Palavras-Chave | #Effective medium theory #Artificially engineered materials #Diffraction theory #Óptica |
Tipo |
info:eu-repo/semantics/article |