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Investigation and Comparison of Phase Modulation Approaches for Superfocusing

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Three types of phase modulation-based subwavelength metallic plasmonic structures were put forth for the purpose of obtaining a best superfocusing performance. To study the influence of depth and width variation of the plasmonic structures on the performance, we considered three types of indirect phase tuning methods: depth modulation, width modulation and hybrid depth–width modulation in our computational simulation analyses. Our computational numerical calculation results demonstrate that focusing performance for the subwavelength metallic plasmonic structure is best for the case of width modulation in comparison to other two modulation approaches. Therefore, it is possible to be used as an optical probe or a type of plasmonic lens for imaging with high resolution in the near future.
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Document Type: Research Article

Publication date: November 1, 2011

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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