Hong Zou, Bo Wang, Liqun Liu, Xiaofeng Wang, Jiahao Li, Weiyi Yu, Jinhai Huang, Xu Yang, Linjian Huang, Li Luo, Qu Wang, Guoding Chen

A new scheme for seven-port division via reflective arrays on a connecting slab

  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
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A seven-port division is described via the connecting-slab-based reflective grating in this paper. The rigorous coupled wave analysis (RCWA) and simulated annealing algorithm (SAA) are chosen to analyze and optimize the performance of the grating. The total diffraction efficiency of TE and TM polarization is 96.75% and 95.53%, respectively. Besides, the target grating has good uniformity errors, which are reduced to 3.69% and 1.76% for TE and TM polarization, respectively. The modal method provides a physical explanation for the energy transformations within the target grating. Furthermore, the manufacturing tolerance is discussed for the seven-port division grating. Through analysis and discussion, various performances of the grating can be better demonstrated. Compared with most seven-port grating splitters reported previously, the grating in this paper achieves better diffraction efficiency uniformity and higher efficiency.

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