Acta Optica Sinica, Volume. 42, Issue 9, 0913001(2022)

On-Chip Terahertz Demultiplexer and Grating Coupler Based on Reverse Design

Guofeng Zhu, Zhenrong Dai, Xuewei Ju, Shuncong Zhong, Xiangfeng Wang, and Feng Huang*
Author Affiliations
  • School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, Fujian, China
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    Figures & Tables(7)
    Flowchart diagram of reverse design method
    Initial layout diagram of terahertz demultiplexer. (a) Initial three-dimensional structure; (b) top view of structure; (c) section view of waveguide structure
    Optimized structure and electric field intensity distribution of terahertz demultiplexer. (a) Top view of device; (b) electric field intensity diagram of 0.500 THz frequency for terahertz wave incident from Port1; (c) electric field intensity diagram of 0.417 THz frequency for terahertz wave incident from Port1; (d) electric field intensity diagram of 0.500 THz frequency for terahertz wave incident from Port2; (e) electric field intensity diagram of 0.417 THz frequency for terahertz wave terahertz incident from Port3
    Spectrum diagram of terahertz demultiplexer at two output ports. (a) Before bandwidth optimization; (b) after bandwidth optimization
    Schematic of initial layout of terahertz grating coupler. (a) Three-dimensional structure diagram of device; (b) top view of device; (c) symmetrical section view of device
    Optimized structure of grating coupler. (a) Variation curve of objective function value with number of iterations; (b) grating structure diagram after continuous optimization; (c) local magnification map after continuous optimization; (d) local magnification map after discrete optimization
    Discrete optimization structure and simulation results of grating coupler. (a) Optimized structure of terahertz grating coupler; (b) electric field intensity distribution diagram
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    Guofeng Zhu, Zhenrong Dai, Xuewei Ju, Shuncong Zhong, Xiangfeng Wang, Feng Huang. On-Chip Terahertz Demultiplexer and Grating Coupler Based on Reverse Design[J]. Acta Optica Sinica, 2022, 42(9): 0913001

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    Paper Information

    Category: Integrated Optics

    Received: Oct. 9, 2021

    Accepted: Nov. 17, 2021

    Published Online: May. 6, 2022

    The Author Email: Feng Huang (huangf@fzu.edu.cn)

    DOI:10.3788/AOS202242.0913001

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