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High transmission of slow light in the photonic crystal waveguide bends

Du Xiao-Yu Zheng Wan-Hua Zhang Ye-Jin Ren Gang Wang Ke Xing Ming-Xin Chen Liang-Hui

High transmission of slow light in the photonic crystal waveguide bends

Du Xiao-Yu, Zheng Wan-Hua, Zhang Ye-Jin, Ren Gang, Wang Ke, Xing Ming-Xin, Chen Liang-Hui
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Publishing process
  • Received Date:  26 February 2008
  • Accepted Date:  22 April 2008
  • Published Online:  20 November 2008

High transmission of slow light in the photonic crystal waveguide bends

  • 1. 中国科学院半导体研究所纳米光电子实验室,北京 100083

Abstract: We present the research on the transmission characteristic of slow-light-mode in the photonic crystal line-defect waveguide bends on SOI. After optimizing the structure parameters in the vicinity of the bends, the normalized transmission efficiency of slow-light-mode through the photonic crystal 60 degree and 120 degree waveguide bends are as high as 80% and 60% respectively, which are 10 times higher than that in the undeformed case. To slow down light further, we design novel coupled cavity waveguide bend structures with high qulity-factor. High normalized transmission efficiency of 75% and low group velocity of c/170 (c is the light velocity in vacuum) are realized. These results are beneficial to enhance the slow light effect of photonic crystal structures and improve the miniaturization and integration of photonic crystal slow light devices.

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