Please use this identifier to cite or link to this item: https://doi.org/10.3390/ma12071005
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dc.titleDiffractive efficiency optimization in metasurface design via electromagnetic coupling compensation
dc.contributor.authorLi, Y.
dc.contributor.authorHong, M.
dc.date.accessioned2021-12-29T04:37:42Z
dc.date.available2021-12-29T04:37:42Z
dc.date.issued2019
dc.identifier.citationLi, Y., Hong, M. (2019). Diffractive efficiency optimization in metasurface design via electromagnetic coupling compensation. Materials 12 (7) : 1005. ScholarBank@NUS Repository. https://doi.org/10.3390/ma12071005
dc.identifier.issn19961944
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/212338
dc.description.abstractMetasurface is an advanced flat optical component that can flexibly manipulate the electromagnetic wave in an ultrathin dimension. However, electromagnetic coupling among neighbored optical elements decreases the diffractive efficiency and increases the noise. In this paper, a novel computational method is proposed to optimize the coupling of the metasurface. The coupled electric fields in metasurface design are decomposed into various coupling orders and then restructured to replace the whole metasurface simulation. This method is applied to optimize a metasurface that consisted of conventional nanorod plasmonic antennas as a case study. The convergence of this method in calculation is demonstrated. The electric field intensity deviation of a nanoantenna array can be reduced from 112.2% to 0.5% by the second-order coupling correction. The diffractive efficiency of a three-level phase meta-deflector is optimized from 73% to 86% by optimized coupling compensation via particle swarm optimization (PSO). This process opens a new area of metasurface design by the detailed field distribution of optical elements. © 2019 by the authors.
dc.publisherMDPI AG
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.sourceScopus OA2019
dc.subjectCoupling compensation
dc.subjectDiffractive efficiency
dc.subjectMetasurface
dc.typeArticle
dc.contributor.departmentDEPT OF ELECTRICAL & COMPUTER ENGG
dc.description.doi10.3390/ma12071005
dc.description.sourcetitleMaterials
dc.description.volume12
dc.description.issue7
dc.description.page1005
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