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Bragg angle illumination on triple-layer grating for two-branch splitter

XU HUANG1, BO WANG1,2,* , RUIJUN LIU1, XUANTONG SHI1, GUOYU LIANG1, YUQING XU1, YONGYUAN HUANG1

Affiliation

  1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China
  2. Guangdong Provincial Key Laboratory of Sensing Physics and System Integration Applications, Guangdong University of Technology, Guangzhou, 510006, China

Abstract

A novel triple-layer structure grating for a two-branch splitter is proposed, which can obtain the 50/50 output with the polarization-independent property. Based on the simplified modal method and rigorous coupled-wave analysis, the parameters of the grating can be obtained. With optimized grating parameters, the efficiencies of TE polarization in the 0th and -1st orders are 49.56% and 49.45%, respectively, and the efficiencies of TM polarization in the 0th and -1st orders are 49.26% and 49.20%, respectively. Moreover, such a triple-layer grating has broad angular bandwidths for both TE and TM polarizations and a wide bandwidth of incident wavelength for TE polarization.

Keywords

Triple-layer grating, Two-branch splitter, 50/50 output, Wide bandwidth.

Citation

XU HUANG, BO WANG, RUIJUN LIU, XUANTONG SHI, GUOYU LIANG, YUQING XU, YONGYUAN HUANG, Bragg angle illumination on triple-layer grating for two-branch splitter, Optoelectronics and Advanced Materials - Rapid Communications, 18, 5-6, May-June 2024, pp.193-199 (2024).

Submitted at: Dec. 11, 2023

Accepted at: June 5, 2024