Laser & Optoelectronics Progress, Volume. 56, Issue 22, 220501(2019)

Optimization of Bilayer Sub-Wavelength Metallic Grating Based on Genetic Algorithm

Chao An, Jinkui Chu*, and Ran Zhang
Author Affiliations
  • School of Mechanical Engineering, Dalian University of Technology, Dalian, Liaoning 116023, China
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    Figures & Tables(8)
    Schematic of bilayer sub-wavelength metallic grating structure
    Chromosome structure of individual
    Flowchart of optimization of GA
    Relationship between fitness function and iteration number
    TM transmittance characteristics of gratings
    Extinction ratio characteristics of gratings
    Analyses of process tolerance. (a)(c)(e)(g) TM transmittance; (b)(d)(f)(h) extinction ratio
    • Table 1. Structural parameters of gratings

      View table

      Table 1. Structural parameters of gratings

      Structurep /nmft /nmh /nmResidual layer /nmnc
      Optimized structure2400.74021002.1
      Conventional structure[18]2000.3757018027.51.6
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    Chao An, Jinkui Chu, Ran Zhang. Optimization of Bilayer Sub-Wavelength Metallic Grating Based on Genetic Algorithm[J]. Laser & Optoelectronics Progress, 2019, 56(22): 220501

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    Paper Information

    Category: Diffraction and Gratings

    Received: Apr. 30, 2019

    Accepted: May. 15, 2019

    Published Online: Nov. 2, 2019

    The Author Email: Chu Jinkui (chujk@dlut.edu.cn)

    DOI:10.3788/LOP56.220501

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